am e05184f2: Merge "Output proguard keep flags for fragment classes." into gingerbread

Merge commit 'e05184f271f9882a5bf828e353aea40e0c06ff69' into gingerbread-plus-aosp

* commit 'e05184f271f9882a5bf828e353aea40e0c06ff69':
  Output proguard keep flags for fragment classes.