[Magisk] Hodenmumps:
Wow, now if feel stupid :D :D

Somehow my brain could not make this connection by himself.

Spoofing and installing of NanoDroid is working now, but i can't install/deinstall any Apps now.

Packeg-Installeris crashing every time.

this is the adb log:

04-19 16:09:28.092 1263 2963 I ActivityManager: START u0 {act=android.intent.action.INSTALL_PACKAGE dat=file:///data/user_de/0/com.android.packageinstaller/no_backup/package5280041018640019413.apk flg=0x10000 cmp=com.android.packageinstaller/.PackageInstallerActivity (has extras)} from uid 10022
04-19 16:09:28.101 5182 5187 I zygote64: Do partial code cache collection, code=46KB, data=48KB
04-19 16:09:28.102 5182 5187 I zygote64: After code cache collection, code=46KB, data=48KB
04-19 16:09:28.102 5182 5187 I zygote64: Increasing code cache capacity to 256KB
04-19 16:09:28.102 5182 5187 I zygote64: Compiler allocated 8MB to compile void android.widget.TextView.<init>(android.content.Context, android.util.AttributeSet, int, int)
04-19 16:09:28.141 5182 5182 I AppSecurityPermissions: Ignoring unknown permission:com.google.android.providers.gsf.permission.READ_GSERVICES
04-19 16:09:28.143 5182 5182 I AppSecurityPermissions: Ignoring unknown permission:com.ghm.carjump.permission.MAPS_RECEIVE
04-19 16:09:28.144 5182 5182 I AppSecurityPermissions: Ignoring unknown permission:com.ghm.carjump.permission.C2D_MESSAGE
04-19 16:09:28.165 5182 5187 I zygote64: Do full code cache collection, code=126KB, data=85KB
04-19 16:09:28.165 5182 5187 I zygote64: After code cache collection, code=126KB, data=72KB
04-19 16:09:28.192 1263 2026 I ActivityManager: Displayed com.android.packageinstaller/.PackageInstallerActivity: +92ms
04-19 16:09:28.236 3731 3731 V DetailsActivity: Stopping activity
04-19 16:09:28.779 1263 3849 I Adreno : QUALCOMM build : 9c9b012, I92eb381bc9
04-19 16:09:28.779 1263 3849 I Adreno : Build Date : 12/31/17
04-19 16:09:28.779 1263 3849 I Adreno : OpenGL ES Shader Compiler Version: EV031.22.00.01
04-19 16:09:28.779 1263 3849 I Adreno : Local Branch :
04-19 16:09:28.779 1263 3849 I Adreno : Remote Branch : refs/tags/AU_LINUX_ANDROID_LA.UM.6.4.R1.08.00.00.309.049
04-19 16:09:28.779 1263 3849 I Adreno : Remote Branch : NONE
04-19 16:09:28.779 1263 3849 I Adreno : Reconstruct Branch : NOTHING
04-19 16:09:28.791 1263 3849 D vndksupport: Loading /vendor/lib64/hw/gralloc.msm8998.so from current namespace instead of sphal namespace.
04-19 16:09:28.805 1263 3849 I Adreno : PFP: 0x005ff087, ME: 0x005ff063
04-19 16:09:28.815 1263 3849 I zygote64: android::hardware::configstore::V1_0::ISurfaceFlingerConfigs::hasWideColorDisplay retrieved: 0
04-19 16:09:28.817 1263 3849 I OpenGLRenderer: Initialized EGL, version 1.4
04-19 16:09:28.817 1263 3849 D OpenGLRenderer: Swap behavior 2
04-19 16:09:29.053 1263 2121 D AudioService: Stream muted, skip playback
04-19 16:09:29.053 1263 2963 I ActivityManager: START u0 {dat=file:///data/user_de/0/com.android.packageinstaller/no_backup/package5280041018640019413.apk cmp=com.android.packageinstaller/.InstallInstalling (has extras)} from uid 10022
04-19 16:09:29.117 5182 5187 I zygote64: Do partial code cache collection, code=126KB, data=74KB
04-19 16:09:29.120 5182 5187 I zygote64: After code cache collection, code=126KB, data=74KB
04-19 16:09:29.120 5182 5187 I zygote64: Increasing code cache capacity to 512KB
04-19 16:09:29.128 5182 5182 D AndroidRuntime: Shutting down VM
04-19 16:09:29.129 5182 5182 E AndroidRuntime: FATAL EXCEPTION: main
04-19 16:09:29.129 5182 5182 E AndroidRuntime: Process: com.android.packageinstaller, PID: 5182
04-19 16:09:29.129 5182 5182 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.packageinstaller/com.android.packageinstaller.InstallInstalling}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.AppOpsManager.checkPackage(int, java.lang.String)' on a null object reference
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.app.ActivityThread.-wrap11(Unknown Source:0)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.os.Handler.dispatchMessage(Handler.java:106)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.os.Looper.loop(Looper.java:164)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.app.ActivityThread.main(ActivityThread.java:6494)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at java.lang.reflect.Method.invoke(Native Method)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:440)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:108)
04-19 16:09:29.129 5182 5182 E AndroidRuntime: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.AppOpsManager.checkPackage(int, java.lang.String)' on a null object reference
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.os.Parcel.readException(Parcel.java:2010)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.os.Parcel.readException(Parcel.java:1950)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.content.pm.IPackageInstaller$Stub$Proxy.createSession(IPackageInstaller.java:254)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.content.pm.PackageInstaller.createSession(PackageInstaller.java:324)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at com.android.packageinstaller.InstallInstalling.onCreate(InstallInstalling.java:147)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.app.Activity.performCreate(Activity.java:6999)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.app.Activity.performCreate(Activity.java:6990)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
04-19 16:09:29.129 5182 5182 E AndroidRuntime:	... 10 more
04-19 16:09:29.131 1263 2227 W ActivityManager: Force finishing activity com.android.packageinstaller/.InstallInstalling
04-19 16:09:29.137 1263 2020 I ActivityManager: Showing crash dialog for package com.android.packageinstaller u0

Thanks!

I will try that out if i find no other Solution to fix NanoDroid.