Halo PS 16 -> 17

Change-Id: I11b694ecd6a46f745596e32d81479b863ff6c232
PS17: Get the correct activity stack: this makes all windows in the same stack to get the floating mode
de-uglify slim recents favorites icon
keep halo windows in recents
more de-uglied rcent icons
hide privacy guard icon from status bar
HALO: make windows moveable and scaleable [WIP]

Change-Id: I8c3118f6d548dc70f186454fb8d15a4bae9bbeb0

Conflicts:

	core/java/android/app/Activity.java
make holo background flat fields