StatusBar PowerMeter: FIX initialization of hidden modes of BatteryMeterView

Previously, everything would work, but the battery icon would return after a reboot. This fixes that.

ps2: update commit message, add GONE to the cmode cases that initialize with a null drawable

Conflicts:
	packages/SystemUI/src/com/android/systemui/BatteryMeterView.java

Change-Id: I9a4a92d3911318dfde84a425097b10bef340e5d5