Add permission that allows cancelling notifications from other apps.

Change-Id: I055b17873e174f71174898a7649b1e221fd8c436

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

Change-Id: Idbcfd4617057984250dc4d4fa32ff55bfbb155e2
Prevent notification acces via HALO on protected lockscreens
Don't show pinned Halo))) apps on PIE (hide count, icons and text)
Enable Bare style PIE on protected lock screen