Revert "Bring floating window in line with ParanoidAndroid"

This reverts commit bfd921f3fa03432396f6fd321225731fdf87107a.
Revert "Floating window: Enable transparent layer"

This reverts commit fc5266700d766c42899743e64ad37e174e490404.
Revert "Base: Floating window with multitasking"

This reverts commit 1b5daceeba20b98f564b11cc667cf6c1c125f11e.
Base: Floating window with multitasking

basic floating window are taken from AOSPA (HALO) by @D4rKn3sSyS

Drawables courtesy of @Alex Cruz thanks to him :)

with heavy change to get this work for multitasking

this feature, has ability to:
1. Moveable window to various position
2. Scaling window with 2 finger like zoom in/out
3. Double tap in actionbar or above window to fullscreen or back to floating window
4. Automatically resize when Snapping into one of side (Top, Bottom, Left, Right)
   (taken from xhalofloatingwindow by @zst123)
5. Automatically switch focus from other app (taken from multiwindow by @xplodwild)
6. Unlimited floating window app (depends on RAM)

this is still under testing, to make fully works
so if there any bug because of this, DO NOT REPORT INTO OMNIROM JIRA

to make app launch using Floating window feature

you must add Intent.FLAG_FLOATING_WINDOW
before start an activity

for example you can look at https://gerrit.omnirom.org/6515

need https://gerrit.omnirom.org/#/c/6561

PS.17 : fix scaling

Change-Id: Iad00c239de7d66e8bb45205ce626d4f08417b7cd

Conflicts:
	core/java/android/app/IActivityManager.java
	core/java/android/content/Intent.java
	core/java/android/view/IWindowManager.aidl
	core/res/res/values/strings_custom.xml
	core/res/res/values/symbols_custom.xml
	services/java/com/android/server/wm/WindowManagerService.java

Conflicts:
	core/java/android/app/Activity.java

Conflicts:
	core/java/android/app/Activity.java
	core/java/android/content/Intent.java
	core/java/android/view/IWindowManager.aidl
	core/res/res/values/liquid_strings.xml
	core/res/res/values/liquid_symbols.xml
	services/java/com/android/server/wm/WindowManagerService.java