am 25b52a2f: SIP: remove dependency on javax.sip.SipException.

Merge commit '25b52a2f97df112c2836972d0b6d9a4c7a9c4a4e' into gingerbread-plus-aosp

* commit '25b52a2f97df112c2836972d0b6d9a4c7a9c4a4e':
  SIP: remove dependency on javax.sip.SipException.