HALO: keep apps in recents

Change-Id: I9ede8a1aba8d6721f077a39a31b6cc5cd8272dc2

Conflicts:
	services/java/com/android/server/am/ActivityRecord.java
Frameworks: privacy guard fix UI freeze

randomly sometimes the complete UI freezes when toggle
privacy guard. Move out the forcekill from syncronized to
fix it so that it kills the app when all threads are open
and they can react to the forcekill which cannot result then in unknown states

cheers

Change-Id: I81514dc5ca9149477ee747a7d90720b83f741baa
Add permission that allows cancelling notifications from other apps.

Signed-off-by: Paul Beeler <sparksco@gmail.com>
Revert "HALO: keep apps in recents"

This reverts commit cdcb466554daeee961aee06e8b4b28d04e347467.