Merge "Ignore null action in AppWidgetServiceImpl." into main am: cf4fd8c4b5 am: 2431166777

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3322499

Change-Id: Icd825c3303b929170d8bd327cc1e6f46cc94c77e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>