Camera button support (2/2)

Add new bitmask for Camera button and options to rebind
its functionality.

Change-Id: I803d3b99adcdd6f2d9de15091709fc8c783ed5de

Add missing variables for camera button handling

Change-Id: I40abd4344800e8cf61285923cc1fac9ba39d652c

Camera button support: fix FC

Fixed a typo in xml which caused Settings FC.

Change-Id: I0c01d03cc8effde9d8422e091a7389dcbb59ffa5

Camera button support: fix another ^C^V fail

Yes, that was merged way too fast...

Change-Id: I88243887446876de39e79020e6d8fecc6351bdde