Fix button settings for hard key and non-telephony devices

-- Add back button category to possible disabled hard keys
   Gotta disable if force navbar is enabled

-- Don't filter for quick contacts on non-telephony devices
   it's already disabled until we can make a in-house contacts
   dialog instead of using activity result

Change-Id: I1e60df45ab51e62b3973ec9f00f9c4aa0eb02385