AI 143716: am: CL 143696 am: CL 143576 SDK doc change: Fix links from SDK...

AI 143716: am: CL 143696 am: CL 143576 SDK doc change: Fix links from SDK upgrading docs to migration and diff info.
  Original author: ddougherty
  Merged from: //branches/cupcake/...
  Original author: android-build
  Merged from: //branches/donutburger/...

Automated import of CL 143716