Merge "Ignore null action in DeviceIdleController." into main am: 1539943b32

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3324493

Change-Id: Iff35ca27439fcedb6df3904f8ea00aff20bd0605
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>