am 1d158357: SipPhone: do not append SIP domain to PSTN number

Merge commit '1d1583573d2099756bbbeef48d97c280edc393e0' into gingerbread-plus-aosp

* commit '1d1583573d2099756bbbeef48d97c280edc393e0':
  SipPhone: do not append SIP domain to PSTN number