Revert "Fix SystemUI memory leaks on theme changes."

This reverts commit 9975780f073b29fbb85b0ee1cd700f1828f783c7.

Conflicts:
	packages/SystemUI/src/com/android/systemui/quicksettings/BatteryTile.java
	packages/SystemUI/src/com/android/systemui/quicksettings/DockBatteryTile.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsController.java
	packages/SystemUI/src/com/android/systemui/statusbar/policy/CircleBattery.java
	packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java