QuickSettings : Add longpress for Torch Tile

Add long press capability to torch tile + Fix string mishap

Change-Id: I760c54b9abfe5e549a29b0f06660a6bf84f1d200
QuickSettings: Add light grey QS drawables for use in Settings

Change-Id: I293aaff06e5c604a01138f30297c01d98de9430e