Revert "Clean up quick settings tile code."

This reverts commit 96350ea7766a6cdfc399acc63b72262779abc36a.

Conflicts:
	packages/SystemUI/src/com/android/systemui/quicksettings/AutoRotateTile.java
	packages/SystemUI/src/com/android/systemui/quicksettings/BatteryTile.java
	packages/SystemUI/src/com/android/systemui/quicksettings/GPSTile.java
	packages/SystemUI/src/com/android/systemui/quicksettings/HeadsUpTile.java
	packages/SystemUI/src/com/android/systemui/quicksettings/MobileNetworkTile.java
	packages/SystemUI/src/com/android/systemui/quicksettings/PreferencesTile.java
	packages/SystemUI/src/com/android/systemui/quicksettings/RemoteDisplayTile.java
	packages/SystemUI/src/com/android/systemui/quicksettings/UsbTetherTile.java
	packages/SystemUI/src/com/android/systemui/quicksettings/UserTile.java