Merge changes from topic "presubmit-am-b3cb1be8a230487d8bec0d1ac2f63c12"
* changes:
[automerge] BroadcastRecord's receivers could be null. 2p: 505838ed 2p: f8a17fbd
[automerge] BroadcastRecord's receivers could be null. 2p: 505838ed
BroadcastRecord's receivers could be null.