Merge tag 'android-security-8.1.0_r87' into staging/lineage-15.1_merge_android-security-8.1.0_r87

Android security 8.1.0 release 87

* tag 'android-security-8.1.0_r87':
  [DO NOT MERGE] Close screenshot process on user switched
  DO NOT MERGE: WM: Only allow system to use NO_INPUT_CHANNEL.
  RESTRICT AUTOMERGE Allow CDM to hide overlays
  RESTRICT AUTOMERGE Prevent non-system overlays from showing over CDM UI

Change-Id: I8cb6d9a8e20cafbac59d1574ce1b1bc27e296b22