Revert "base: Add dock battery support"

This reverts commit fafcb823ab8bc111e72ed108259ba8aa85dee4f0.

Conflicts:
	core/java/android/app/IBatteryService.aidl
	core/java/android/os/BatteryManager.java
	core/java/android/os/BatteryProperties.java
	core/res/res/values/cm_strings.xml
	packages/SystemUI/src/com/android/systemui/BatteryMeterView.java

Change-Id: I4526dd3f06bc9b9ff1d0687e0055f2f0e7e362b2