[automerger skipped] Fix NPE when PermissionEntry.getGids() returns null. am: 1ba16aa8bf -s ours

am skip reason: Merged-In I71a160d53b1a1b429019bb1973a892f78ccb0a17 with SHA-1 b0b149c456 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/26336676

Change-Id: If8fb927032289fe14592a6ee94766ab7038cbd66
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>