am 564a533e: am 66442b56: am 775deb88: am 9af97443: Merge "docs: Added landing page for Google Play Games Platform Services. cherrypick from jb-mr1-dev docs:  Play Games changes Change-Id: I5117db8511907e05ddc84005bf6903251de46f71" into jb-mr1.1-docs

* commit '564a533e8a176541947a52261ac6e8ba3b2b5b21':
  docs: Added landing page for Google Play Games Platform Services. cherrypick from jb-mr1-dev docs:  Play Games changes Change-Id: I5117db8511907e05ddc84005bf6903251de46f71