InCallUI: Add initial smart cover support

Change-Id: I7bd476a725efff9a3b9cfce91771750e231ea50f
Signed-off-by: Roman Birg <roman@cyngn.com>
Merge "InCallUI: Add initial smart cover support" into cm-11.0
Merge remote-tracking branch 'cyanogen/cm-11.0' into cm-11.0