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

* commit 'e4e8dffd41c0f7aaf005418b71cae7738ad868d2':
  Doc change: add Android 3.1 highlights and version notes.