Update Floating Window

PS.17 : fix scaling
PS.18 : fix layout calculation when rotate

Change-Id: Iad00c239de7d66e8bb45205ce626d4f08417b7cd

Conflicts:
	core/java/android/app/Activity.java
	core/java/android/app/IActivityManager.java
	core/java/android/content/Intent.java
	core/java/android/view/IWindowManager.aidl
	core/java/android/view/Window.java
	core/java/com/android/internal/widget/ActionBarView.java
	core/res/res/values/custom_strings.xml
	core/res/res/values/symbols.xml
	core/res/res/values/themes_device_defaults.xml
	services/input/InputWindow.cpp
	services/java/com/android/server/am/ActivityRecord.java
	services/java/com/android/server/am/ActivityStack.java
	services/java/com/android/server/wm/WindowManagerService.java
Update Floating to PS19
Update to PS 20
Update