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 branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_InCallUI into cm-11.0
Merge branch 'cm-11.0' of https://github.com/temasek/android_packages_apps_InCallUI into HEAD