Merge tag 'android-security-8.1.0_r92' into staging/lineage-15.1_merge_android-security-8.1.0_r92

Android security 8.1.0 release 92

* tag 'android-security-8.1.0_r92':
  Don't attach private Notification to A11yEvent when user locked
  Improve ellipsize performance
  Fix side effects of trace-ipc and dumpheap commands
  Fix race condition between lockNow() and updateLockscreenTimeout

Change-Id: I58ec12d101222bf5071f82bc91ee2daf9a50873d