am c6dddc61: am e2875bdb: DO NOT MERGE: Add status callback for start/stop...
am c6dddc61: am e2875bdb: DO NOT MERGE: Add status callback for start/stop advertising. cherrypick from master to fix b/13289050
* commit 'c6dddc61':
DO NOT MERGE: Add status callback for start/stop advertising. cherrypick from master to fix b/13289050