am 6037a056: Fix n-way conf call in SipPhone.

Merge commit '6037a056ea0dda27a286ddcb527b323b58a1c7c7' into gingerbread-plus-aosp

* commit '6037a056ea0dda27a286ddcb527b323b58a1c7c7':
  Fix n-way conf call in SipPhone.