am ca54cdaf: Merge "SipService: fix thread/socket leak" into gingerbread

Merge commit 'ca54cdaf66449cd4f81d8887ec603392b8f3779c' into gingerbread-plus-aosp

* commit 'ca54cdaf66449cd4f81d8887ec603392b8f3779c':
  SipService: fix thread/socket leak