am 4c071f0d: am 59625fa8: am 946f9d1e: Merge change I020b31e1 into eclair-sdk

Merge commit '4c071f0d69ac0e3eaf386797faeb52d63de30806' into eclair-mr2-plus-aosp

* commit '4c071f0d69ac0e3eaf386797faeb52d63de30806':
  doc change: add SDK sizes, checksums, small changes for online SDK doc set, add layoutopt doc.