am e6547423: Merge change I10073d50 into eclair

Merge commit 'e6547423e3ed7d84f0d7fee8199e5bbb015fd8c3' into eclair-plus-aosp

* commit 'e6547423e3ed7d84f0d7fee8199e5bbb015fd8c3':
  Add Annotation for optional features.