am a2cd828b: am 9fcde2e7: am cb815699: am 00e9db5d: am b23a35a3: am ba84a04a: Merge "docs: update javadocs for gms and gcm" into jb-mr1-dev

# Via Android Git Automerger (5) and others
* commit 'a2cd828b749c444d55c2c41c7dbb85088ff94b9f':
  docs: update javadocs for gms and gcm