am e57c3a88: Merge "Add APIs for finding heavy-weight apps." into gingerbread

Merge commit 'e57c3a88b99856d1e69fdf115e7c7954594b7385' into gingerbread-plus-aosp

* commit 'e57c3a88b99856d1e69fdf115e7c7954594b7385':
  Add APIs for finding heavy-weight apps.