Settings: Replace low battery warning icon with Google warning icon

PS1: replace string in PowerUsageSummary to point to new icon
and replace drawables with Google drawables

Change-Id: Ie123feabb7a74feb61f4cd732ae9b1326099a1e7
Add Percent only Battery icon

Conflicts:
	res/values/simpleaosp_arrays.xml
	res/values/simpleaosp_strings.xml
Battery light rework

Add ability to customize battery Led