Add permission that allows cancelling notifications from other apps.
http://review.cyanogenmod.org/#/c/45219/

Notification cancellation fixes:
Permission should only allow cancellation of other app notifications, not enqueueing.
Fix checkapi breakage.

http://review.cyanogenmod.org/#/c/45244/

Change-Id: Ib1045e150bcfe0d4fc9bb16de1aa30bad63e3d99
 ISms class for VoicePlus

Change-Id: I3227ee7da443fbfe410aeb78f75e22945b7edd0f