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 '9af9744319f389b6583b8c39ea65bf90afc10fe5':
  docs: Added landing page for Google Play Games Platform Services. cherrypick from jb-mr1-dev docs:  Play Games changes Change-Id: I5117db8511907e05ddc84005bf6903251de46f71