Merge "Ignore null action in WebViewUpdateService." into main am: 749f16456c

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3327734

Change-Id: I3fd61fcfb1db0bc78266a73bb1bd430d562dd0ee
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>