Merge "Ignore null action in ActivityManagerService." into main am: 188e0810aa am: ab94caad91

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3327883

Change-Id: I4bb9246f56419437ad0451e0113d3693f88014f4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>