FB: Halo (2/2)

Forward port of Paranoid Androids Halo.

Conflicts:
	core/java/android/app/Activity.java
	core/java/android/app/INotificationManager.aidl
	core/java/android/app/Profile.aidl
	core/java/android/provider/Settings.java
	packages/SystemUI/AndroidManifest.xml
	packages/SystemUI/res/layout/status_bar_expanded_header.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