Prevent notification acces via HALO on protected lockscreens
HALO: keep apps in recents

Change-Id: I9ede8a1aba8d6721f077a39a31b6cc5cd8272dc2

Conflicts:
	services/java/com/android/server/am/ActivityRecord.java
Revert "Fix little derp causing visual bug"

This reverts commit 15baff07e835fdccf2160b4499b97962d83a0ee3.