am 7bb37c87: am 0480d5d8: Merge "docs: Android SDK 21.1.0 Release Notes" into jb-mr1-dev

# Via Android (Google) Code Review (1) and others
* commit '7bb37c8748b6c7e36a18b7e55cc0b8af65b45099':
  docs: Android SDK 21.1.0 Release Notes