Merge "Ignore null action in AppRestrictionController." into main am: 56b26cfc95

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3319814

Change-Id: Ie9e31f8068753051714edfd558e40a4c80c032d6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>