Update the battery broadcast receiver.

Add a type for battery receiver, then in callback client know for
which reason it been invoked:
1. battery level change
2. battery saver state change
3. battery plug state change

So in this CL, we won't update battery tip for battery level change,
then battery tip won't be dismissed by itself.

Also note in onResume() we will manually update battery tip. So if
user stay in battery settings page and close the screen, once he opens
it we will still force update everything.

Fixes: 79171742
Test: RunSettingsRoboTests

Change-Id: I997844216fd8267e545d74e0d434de9e338f76a1
Merged-In: I997844216fd8267e545d74e0d434de9e338f76a1