am 5d3e89be: am d6aa68b6: 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-mr

* commit '5d3e89beb090cdfa1e305025a4e10f0591b2fa66':
  docs: Added landing page for Google Play Games Platform Services. cherrypick from jb-mr1-dev docs:  Play Games changes Change-Id: I5117db8511907e05ddc84005bf6903251de46f71