base: added charging animation for battery percent style

Inspired from circle style

http://jira.omnirom.org/browse/OMNI-840

PS3:
-using bar style

PS8:
-again full height band

Change-Id: I5a83cd7ea6fa437a9bdf0e9b4451071a591cd3b5
Merge pull request #8 from omnirom/android-4.4

base: added charging animation for battery percent style