overlay: update frameworks overlays

Change-Id: Ie532f765ec6269303b7d98e803a3a258200fb36b
overlay: enable "needsHTCCamMode" switch for Gallery2

Change-Id: I632ef8b9600e844dc55a9346e50d76eecb532b79
system.prop: try and fix BT

Change-Id: I517e6a886db4f9b9e1deaf89cef8955e84888850