am 0e412304: Catch exceptions in SipPhone.canTake().

Merge commit '0e412304813ccd3a3fb6a643836e4f0922d1dc44' into gingerbread-plus-aosp

* commit '0e412304813ccd3a3fb6a643836e4f0922d1dc44':
  Catch exceptions in SipPhone.canTake().