Add permission that allows cancelling notifications from other apps.

Change-Id: I055b17873e174f71174898a7649b1e221fd8c436

Conflicts:
	core/res/res/values/cm_strings.xml
	services/java/com/android/server/NotificationManagerService.java
Notification cancellation fixes:
Permission should only allow cancellation of other app notifications, not enqueueing.
Fix checkapi breakage.

Change-Id: Idbcfd4617057984250dc4d4fa32ff55bfbb155e2

Conflicts:
	services/java/com/android/server/NotificationManagerService.java
New Event: ACTION_NEW_OUTGOING_SMS

Change-Id: I8be01ad6251ca25e4d00ebffd876bb6ce7f3c283