am 3bb10442: Merge "Make SipService listen to WIFI state change events." into gingerbread

Merge commit '3bb1044243ad38da35ccddc3e0d6d92d64fefe3e' into gingerbread-plus-aosp

* commit '3bb1044243ad38da35ccddc3e0d6d92d64fefe3e':
  Make SipService listen to WIFI state change events.