[Meizu MX] S0bes:
I was without PC a couple of last days so, here's the guide (flyme 5 only!):

SystemUi.apk - com/flyme/systemui/statusbar/phone/FlymeStatusBarIconUtils.smali

replace the entire method

.method public static isInternalApp(Landroid/content/Context;Landroid/service/notification/StatusBarNotification;)Z
....
.end method

with

.method public static isInternalApp(Landroid/content/Context;Landroid/service/notification/StatusBarNotification;)Z
.locals 1
.param p0, "mContext" # Landroid/content/Context;
.param p1, "sbn" # Landroid/service/notification/StatusBarNotification;

.prologue
const/4 v0, 0x1

return v0
.end method

and this one:

.method public static isInternalApp(Landroid/content/Context;Ljava/lang/String;)Z
....
.end method

with this:

.method public static isInternalApp(Landroid/content/Context;Ljava/lang/String;)Z
.locals 1
.param p0, "mContext" # Landroid/content/Context;
.param p1, "pkg" # Ljava/lang/String;

.prologue
const/4 v0, 0x1

return v0
.end method

Next - SystemUI\smali\com\android\systemui\statusbar\StatusBarIconView.smali

find method getIcon:

.method public static getIcon(Landroid/content/Context;Lcom/android/internal/statusbar/StatusBarIcon;)Landroid/graphics/drawable/Drawable;

and replace it with this one:

.method public static getIcon(Landroid/content/Context;Lcom/android/internal/statusbar/StatusBarIcon;)Landroid/graphics/drawable/Drawable;
[B] .locals 10 #changed from 9 to 10. So, there's new register v9[/B]
.param p0, "context" # Landroid/content/Context;
.param p1, "icon" # Lcom/android/internal/statusbar/StatusBarIcon;

.prologue
const/4 v6, 0x0

.line 184
const/4 v3, 0x0

.line 186
.local v3, "r":Landroid/content/res/Resources;
iget-object v5, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconPackage:Ljava/lang/String;

invoke-static {v5}, Lcom/flyme/systemui/statusbar/phone/MeizuCustomizedIcons;->isMeizuCustomizedIcon(Ljava/lang/String;)Z

move-result v5

[B] move v9, v5 # Put isMeizuCustomizedIcon value (0 or 1) into new reg v9[/B]

if-eqz v5, :cond_0

.line 187
iget-object v5, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconPackage:Ljava/lang/String;

invoke-static {v5}, Lcom/flyme/systemui/statusbar/phone/MeizuCustomizedIcons;->getMeizuCustomizedIcon(Ljava/lang/String;)I

move-result v2

.line 188
.local v2, "iconId":I
invoke-virtual {p0}, Landroid/content/Context;->getResources()Landroid/content/res/Resources;

move-result-object v5

invoke-virtual {v5, v2}, Landroid/content/res/Resources;->getDrawable(I)Landroid/graphics/drawable/Drawable;

move-result-object v5

.line 219
.end local v2 # "iconId":I
:goto_0
[B]## 4 new lines
if-nez v9, :cond_skip # if it's meizucustomized icon we do not have to scale it. Otherwise we do

invoke-static {p0, p1, v5}, Lcom/android/systemui/statusbar/IconScale;->ScaleIfNeeded(Landroid/content/Context;Lcom/android/internal/statusbar/StatusBarIcon;Landroid/graphics/drawable/Drawable;)Landroid/graphics/drawable/Drawable;

move-result-object v5

:cond_skip
##[/B]
return-object v5

.line 191
:cond_0
iget-object v5, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconPackage:Ljava/lang/String;

if-eqz v5, :cond_2

.line 193
:try_start_0
iget-object v5, p1, Lcom/android/internal/statusbar/StatusBarIcon;->user:Landroid/os/UserHandle;

invoke-virtual {v5}, Landroid/os/UserHandle;->getIdentifier()I

move-result v4

.line 194
.local v4, "userId":I
const/4 v5, -0x1

if-ne v4, v5, :cond_1

.line 195
const/4 v4, 0x0

.line 197
:cond_1
invoke-virtual {p0}, Landroid/content/Context;->getPackageManager()Landroid/content/pm/PackageManager;

move-result-object v5

iget-object v7, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconPackage:Ljava/lang/String;

invoke-virtual {v5, v7, v4}, Landroid/content/pm/PackageManager;->getResourcesForApplicationAsUser(Ljava/lang/String;I)Landroid/content/res/Resources;
:try_end_0
.catch Landroid/content/pm/PackageManager$NameNotFoundException; {:try_start_0 .. :try_end_0} :catch_0

move-result-object v3

.line 207
.end local v4 # "userId":I
:goto_1
iget v5, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconId:I

if-nez v5, :cond_3

move-object v5, v6

.line 208
goto :goto_0

.line 199
:catch_0
move-exception v1

.line 200
.local v1, "ex":Landroid/content/pm/PackageManager$NameNotFoundException;
const-string v5, "StatusBarIconView"

new-instance v7, Ljava/lang/StringBuilder;

invoke-direct {v7}, Ljava/lang/StringBuilder;-><init>()V

const-string v8, "Icon package not found: "

invoke-virtual {v7, v8}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v7

iget-object v8, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconPackage:Ljava/lang/String;

invoke-virtual {v7, v8}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v7

invoke-virtual {v7}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

move-result-object v7

invoke-static {v5, v7}, Landroid/util/Log;->e(Ljava/lang/String;Ljava/lang/String;)I

move-object v5, v6

.line 201
goto :goto_0

.line 204
.end local v1 # "ex":Landroid/content/pm/PackageManager$NameNotFoundException;
:cond_2
invoke-virtual {p0}, Landroid/content/Context;->getResources()Landroid/content/res/Resources;

move-result-object v3

goto :goto_1

.line 212
:cond_3
:try_start_1
iget v5, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconId:I

invoke-virtual {v3, v5}, Landroid/content/res/Resources;->getDrawable(I)Landroid/graphics/drawable/Drawable;
:try_end_1
.catch Ljava/lang/RuntimeException; {:try_start_1 .. :try_end_1} :catch_1

move-result-object v5

goto :goto_0

.line 213
:catch_1
move-exception v0

.line 214
.local v0, "e":Ljava/lang/RuntimeException;
const-string v7, "StatusBarIconView"

new-instance v5, Ljava/lang/StringBuilder;

invoke-direct {v5}, Ljava/lang/StringBuilder;-><init>()V

const-string v8, "Icon not found in "

invoke-virtual {v5, v8}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v8

iget-object v5, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconPackage:Ljava/lang/String;

if-eqz v5, :cond_4

iget v5, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconId:I

invoke-static {v5}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;

move-result-object v5

:goto_2
invoke-virtual {v8, v5}, Ljava/lang/StringBuilder;->append(Ljava/lang/Object;)Ljava/lang/StringBuilder;

move-result-object v5

const-string v8, ": "

invoke-virtual {v5, v8}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v5

iget v8, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconId:I

invoke-static {v8}, Ljava/lang/Integer;->toHexString(I)Ljava/lang/String;

move-result-object v8

invoke-virtual {v5, v8}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

move-result-object v5

invoke-virtual {v5}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

move-result-object v5

invoke-static {v7, v5}, Landroid/util/Log;->w(Ljava/lang/String;Ljava/lang/String;)I

move-object v5, v6

.line 219
goto :goto_0

.line 214
:cond_4
const-string v5, "<system>"

goto :goto_2
.end method

I've made some notes # in case you're interested to understand what exactly was changed in method

and finally add file IconScale.smali to the SystemUI\smali\com\android\systemui\statusbar\ dirrectory

The file contains following strings:

.class Lcom/android/systemui/statusbar/IconScale;
.super Ljava/lang/Object;
.source "IconScale.java"

# static fields
.field public static scaled_anim:Landroid/graphics/drawable/AnimationDrawable;

# direct methods
.method static constructor <clinit>()V
.locals 1

.prologue
.line 13
const/4 v0, 0x0

sput-object v0, Lcom/android/systemui/statusbar/IconScale;->scaled_anim:Landroid/graphics/drawable/AnimationDrawable;

return-void
.end method

.method public constructor <init>()V
.locals 0

.prologue
.line 11
invoke-direct {p0}, Ljava/lang/Object;-><init>()V

return-void
.end method

.method public static ScaleIfNeeded(Landroid/content/Context;Lcom/android/internal/statusbar/StatusBarIcon;Landroid/graphics/drawable/Drawable;)Landroid/graphics/drawable/Drawable;
.locals 2
.param p0, "context" # Landroid/content/Context;
.param p1, "icon" # Lcom/android/internal/statusbar/StatusBarIcon;
.param p2, "dr" # Landroid/graphics/drawable/Drawable;

.prologue
.line 18
const/4 v0, 0x0

.line 20
.local v0, "pkg":Ljava/lang/String;

iget-object v0, p1, Lcom/android/internal/statusbar/StatusBarIcon;->iconPackage:Ljava/lang/String;

invoke-static {p0, v0}, Lcom/android/systemui/statusbar/IconScale;->isSystemApp(Landroid/content/Context;Ljava/lang/String;)Z

move-result v1

if-nez v1, :cond_0

.line 22
instance-of v1, p2, Landroid/graphics/drawable/BitmapDrawable;

if-eqz v1, :cond_1

.line 24
invoke-static {p0, p2}, Lcom/android/systemui/statusbar/IconScale;->scaleIcon(Landroid/content/Context;Landroid/graphics/drawable/Drawable;)Landroid/graphics/drawable/BitmapDrawable;

move-result-object p2

.line 34
.end local p2 # "dr":Landroid/graphics/drawable/Drawable;
:cond_0
:goto_0
return-object p2

.line 27
.restart local p2 # "dr":Landroid/graphics/drawable/Drawable;
:cond_1
instance-of v1, p2, Landroid/graphics/drawable/AnimationDrawable;

if-eqz v1, :cond_0

.line 29
check-cast p2, Landroid/graphics/drawable/AnimationDrawable;

.end local p2 # "dr":Landroid/graphics/drawable/Drawable;
invoke-static {p0, p2}, Lcom/android/systemui/statusbar/IconScale;->scaleAnimation(Landroid/content/Context;Landroid/graphics/drawable/AnimationDrawable;)Landroid/graphics/drawable/AnimationDrawable;

move-result-object p2

goto :goto_0
.end method

.method public static isException(Ljava/lang/String;)Z
.locals 1
.param p0, "pkg" # Ljava/lang/String;

.prologue
.line 88
const-string v0, "com.google.android.apps.gmm"

invoke-virtual {p0, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

move-result v0

if-nez v0, :cond_0

.line 89
const-string v0, "com.google.android.googlequicksearchbox"

invoke-virtual {p0, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

move-result v0

if-nez v0, :cond_0

.line 90
const-string v0, "com.google.android.gms"

invoke-virtual {p0, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

move-result v0

if-nez v0, :cond_0

.line 91
const-string v0, "com.android.vending"

invoke-virtual {p0, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

move-result v0

if-eqz v0, :cond_1

.line 92
:cond_0
const/4 v0, 0x1

.line 93
:goto_0
return v0

:cond_1
const/4 v0, 0x0

goto :goto_0
.end method

.method public static isSystemApp(Landroid/content/Context;Ljava/lang/String;)Z
.locals 5
.param p0, "context" # Landroid/content/Context;
.param p1, "pkg" # Ljava/lang/String;

.prologue
const/4 v2, 0x0

.line 72
if-eqz p1, :cond_0

invoke-static {p1}, Lcom/android/systemui/statusbar/IconScale;->isException(Ljava/lang/String;)Z

move-result v3

if-eqz v3, :cond_1

.line 80
:cond_0
:goto_0
return v2

.line 75
:cond_1
:try_start_0
invoke-virtual {p0}, Landroid/content/Context;->getPackageManager()Landroid/content/pm/PackageManager;

move-result-object v3

const/4 v4, 0x0

invoke-virtual {v3, p1, v4}, Landroid/content/pm/PackageManager;->getApplicationInfo(Ljava/lang/String;I)Landroid/content/pm/ApplicationInfo;

move-result-object v0

.line 76
.local v0, "appInfo":Landroid/content/pm/ApplicationInfo;
if-eqz v0, :cond_0

iget v3, v0, Landroid/content/pm/ApplicationInfo;->flags:I
:try_end_0
.catch Landroid/content/pm/PackageManager$NameNotFoundException; {:try_start_0 .. :try_end_0} :catch_0

and-int/lit8 v3, v3, 0x1

if-eqz v3, :cond_0

.line 77
const/4 v2, 0x1

goto :goto_0

.line 78
.end local v0 # "appInfo":Landroid/content/pm/ApplicationInfo;
:catch_0
move-exception v1

.line 79
.local v1, "e":Landroid/content/pm/PackageManager$NameNotFoundException;
invoke-virtual {v1}, Landroid/content/pm/PackageManager$NameNotFoundException;->printStackTrace()V

goto :goto_0
.end method

.method public static scaleAnimation(Landroid/content/Context;Landroid/graphics/drawable/AnimationDrawable;)Landroid/graphics/drawable/AnimationDrawable;
.locals 5
.param p0, "ctx" # Landroid/content/Context;
.param p1, "Aicon" # Landroid/graphics/drawable/AnimationDrawable;

.prologue
const/4 v3, 0x0

.line 47
invoke-virtual {p1, v3}, Landroid/graphics/drawable/AnimationDrawable;->getFrame(I)Landroid/graphics/drawable/Drawable;

move-result-object v0

check-cast v0, Landroid/graphics/drawable/BitmapDrawable;

.line 48
.local v0, "frame00":Landroid/graphics/drawable/BitmapDrawable;
invoke-static {p0, v0}, Lcom/android/systemui/statusbar/IconScale;->scaleIcon(Landroid/content/Context;Landroid/graphics/drawable/Drawable;)Landroid/graphics/drawable/BitmapDrawable;

move-result-object v0

.line 49
new-instance v2, Landroid/graphics/drawable/AnimationDrawable;

invoke-direct {v2}, Landroid/graphics/drawable/AnimationDrawable;-><init>()V

sput-object v2, Lcom/android/systemui/statusbar/IconScale;->scaled_anim:Landroid/graphics/drawable/AnimationDrawable;

.line 50
sget-object v2, Lcom/android/systemui/statusbar/IconScale;->scaled_anim:Landroid/graphics/drawable/AnimationDrawable;

invoke-virtual {v2, v3}, Landroid/graphics/drawable/AnimationDrawable;->setOneShot(Z)V

.line 51
sget-object v2, Lcom/android/systemui/statusbar/IconScale;->scaled_anim:Landroid/graphics/drawable/AnimationDrawable;

invoke-virtual {v2, v0, v3}, Landroid/graphics/drawable/AnimationDrawable;->addFrame(Landroid/graphics/drawable/Drawable;I)V

.line 54
const/4 v1, 0x0

.local v1, "i":I
:goto_0
invoke-virtual {p1}, Landroid/graphics/drawable/AnimationDrawable;->getNumberOfFrames()I

move-result v2

add-int/lit8 v2, v2, -0x1

if-le v1, v2, :cond_0

.line 60
sget-object v2, Lcom/android/systemui/statusbar/IconScale;->scaled_anim:Landroid/graphics/drawable/AnimationDrawable;

return-object v2

.line 56
:cond_0
sget-object v2, Lcom/android/systemui/statusbar/IconScale;->scaled_anim:Landroid/graphics/drawable/AnimationDrawable;

invoke-virtual {p1, v1}, Landroid/graphics/drawable/AnimationDrawable;->getFrame(I)Landroid/graphics/drawable/Drawable;

move-result-object v3

invoke-static {p0, v3}, Lcom/android/systemui/statusbar/IconScale;->scaleIcon(Landroid/content/Context;Landroid/graphics/drawable/Drawable;)Landroid/graphics/drawable/BitmapDrawable;

move-result-object v3

invoke-virtual {p1, v1}, Landroid/graphics/drawable/AnimationDrawable;->getDuration(I)I

move-result v4

invoke-virtual {v2, v3, v4}, Landroid/graphics/drawable/AnimationDrawable;->addFrame(Landroid/graphics/drawable/Drawable;I)V

.line 54
add-int/lit8 v1, v1, 0x1

goto :goto_0
.end method

.method public static scaleIcon(Landroid/content/Context;Landroid/graphics/drawable/Drawable;)Landroid/graphics/drawable/BitmapDrawable;
.locals 4
.param p0, "ctx" # Landroid/content/Context;
.param p1, "icon" # Landroid/graphics/drawable/Drawable;

.prologue
const/16 v3, 0x20

.line 65
check-cast p1, Landroid/graphics/drawable/BitmapDrawable;

.end local p1 # "icon":Landroid/graphics/drawable/Drawable;
invoke-virtual {p1}, Landroid/graphics/drawable/BitmapDrawable;->getBitmap()Landroid/graphics/Bitmap;

move-result-object v1

.line 66
.local v1, "src":Landroid/graphics/Bitmap;
const/4 v2, 0x1

invoke-static {v1, v3, v3, v2}, Landroid/graphics/Bitmap;->createScaledBitmap(Landroid/graphics/Bitmap;IIZ)Landroid/graphics/Bitmap;

move-result-object v0

.line 67
.local v0, "dest":Landroid/graphics/Bitmap;
new-instance v2, Landroid/graphics/drawable/BitmapDrawable;

invoke-virtual {p0}, Landroid/content/Context;->getResources()Landroid/content/res/Resources;

move-result-object v3

invoke-direct {v2, v3, v0}, Landroid/graphics/drawable/BitmapDrawable;-><init>(Landroid/content/res/Resources;Landroid/graphics/Bitmap;)V

return-object v2
.end method

where const/16 v3, 0x20 is a size of icons. 20hex = 32 pix