[2/2] Frameworks: HALO

Forward port from jb.
PS1: Initial port
     Fix conficts with notification LED
     Fix derp
     Major derp
     HALO Mods
     Rebase
     Fix blackist, code clean and added some TODOs
PS2: Fix build
PS3: Fix bubble sometimes doesn't respond on new notification
PS4: Align halo icon
PS5: Keep floating app in recents and disable transparent layer temporarily
PS6: Fix conflict after recent merges
PS7: Cosmetic fixes:
* Fix buttons layout in status bar.
* Status bar button holders show halo + qs switch on notification and qs edit mode + notification switch on qs.
* Update new margins size.

Change-Id: I3e79945433d61da090ca263f4e2989be9987f11d

Conflicts:
	core/java/android/app/INotificationManager.aidl
	core/java/android/provider/Settings.java
	packages/SystemUI/AndroidManifest.xml
	packages/SystemUI/res/layout/status_bar_expanded_header.xml
	packages/SystemUI/res/values/pa_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
	services/java/com/android/server/NotificationManagerService.java
	services/java/com/android/server/am/ActivityStack.java