Frameworks: Port BatteryBar (1/2)
{x} Adds Battery bar with following features:
{x} location set
{x} color
{x} aligment
{x} thickness
{x} charging animation

Change-Id: Ie9a168121dc569ec3af068a4bda6b46a4e896b2d

Conflicts:
	packages/SystemUI/res/values/attrs.xml
	packages/SystemUI/src/com/android/systemui/statusbar/policy/Prefs.java