Add vendor specific settings and prefs

This currently includes camera settings and webrtc prefs.

Change-Id: I38ccf37526041e7d0d727fcd8f69565cc8f6f7e0
Merge "Add vendor specific settings and prefs"
Merge tag 'LNX.LF.3.5.1-06900-8x10.0' into b2g_kk_3.5

"LNX.LF.3.5.1-06900-8x10.0"