QuickSettings: Camera tile

Change-Id: Id0beb3dd559536bb5571ddc87cb0bcb4945b1a77

Conflicts:
	packages/SystemUI/res/layout/quick_settings_tile_camera.xml
	packages/SystemUI/src/com/android/systemui/quicksettings/CameraTile.java
	packages/SystemUI/src/com/android/systemui/quicksettings/QuickSettingsTile.java