Merge changes from topic "presubmit-am-da4c6b1f3d1848f2b5dcf9ea111fdce2"
* changes:
[automerge] Update BroadcastDispatcher docs to say not to call goAsync() 2p: f2606d0f 2p: c02a745e
[automerge] Update BroadcastDispatcher docs to say not to call goAsync() 2p: f2606d0f
Update BroadcastDispatcher docs to say not to call goAsync()