SystemUI: Battery Bar

TODO: Still has same bug on sw600dp where centered-mirrored is off center

Change-Id: I938ef890459c600406a989414381e42df6d89ae0

Conflicts:

	core/java/android/provider/Settings.java

Conflicts:

	packages/SystemUI/src/com/android/systemui/statusbar/policy/Prefs.java
fixing conflicts between battery bar and fast charge in Prefs