[1/2] Base: Battery Saver mode

Change-Id: I9d86ef1425228e11cadd85d37c5b6e8b20e50fb0

Conflicts:
	core/java/android/content/Intent.java
	packages/SystemUI/AndroidManifest.xml
	packages/SystemUI/res/values/ose_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/policy/BatteryController.java
	services/java/com/android/server/NotificationManagerService.java