Settings: Battery bar (2/2)

Patch Set 1:    * initial release
Patch Set 2:    * minor code cleanup

SCREENSHOT: http://i.imgur.com/JSnr5tn.png

Change-Id: I6303194046f91a40f045d6cac1f1377195280589

Conflicts:
	res/values/strings.xml

Change-Id: I6303194046f91a40f045d6cac1f1377195280589