am 63c5a2bc: am e4e8dffd: am 0d5196b9: am 5f8f0a0d: Merge "Doc change: add Android 3.1 highlights and version notes." into honeycomb-mr1

* commit '63c5a2bc39839804442ba2800b6d974d0391f2cc':
  Doc change: add Android 3.1 highlights and version notes.