am 9c628cea: (-s ours) am 93cb7b67: am e3c4ef80: am 24dce607: DO NOT MERGE: Add status callback for start/stop advertising. cherrypick from master to fix b/13289050

* commit '9c628cea53773c6290b665b8f427575310a010dc':
  DO NOT MERGE: Add status callback for start/stop advertising. cherrypick from master to fix b/13289050