Merge changes from topic "presubmit-am-5afc0bf9bc1d45e795f2a48bfafc5aea"
* changes:
[automerge] Prune summaries if only group children filtered 2p: be918ae7 2p: 75b1db6e
[automerge] Prune summaries if only group children filtered 2p: be918ae7
Prune summaries if only group children filtered