am dc243482: Merge "Add API to get all foreground calls." into gingerbread

Merge commit 'dc243482d6e104c4a3cddaa694c2ee3c628c2c20' into gingerbread-plus-aosp

* commit 'dc243482d6e104c4a3cddaa694c2ee3c628c2c20':
  Add API to get all foreground calls.