Fix possible NPE

Change-Id: I9d7e9019c4caac6ab1e534ef7b6dc84d19400a8f
QuickSettings : Add torch tile

Change-Id: I3d206c95e5da15a0717b500ed30efc69ff28c07d
QuickSettings: Use the new QS drawables for the settings too.

Before it used the old power widget drawables, some of which
look quite different from the ones actually used by QS.

Change-Id: I022b1e3499bb69f0b974e610719778b16a59c543