Merge tag 'android-security-8.1.0_r82' into staging/lineage-15.1_merge-android-security-8.1.0_r82

Android security 8.1.0 release 82

* tag 'android-security-8.1.0_r82':
  FileMap::create: remove duplicate addition.
  Fail explicitly on length overflow.

Change-Id: I7b568f086a88671fa79a8fa80913ea04154581bb