[automerger skipped] Fix missing return when trying to skip threads dump when mutator lock is exclusively held
am: f48ed275c3 -s ours
am skip reason: change_id I0b2021f03f7744b580cda62550ee16d39f1bf7e0 with SHA1 54a6d4c123 is in history

Change-Id: I42bbbb2ace63e391bab388eff1658dbcf56324c5