am 8b8b4536: am 8fb2e6e4: PhoneFactory: add makeSipPhone()

Merge commit '8b8b4536314d1354c244af2c9e665c4db4e27522'

* commit '8b8b4536314d1354c244af2c9e665c4db4e27522':
  PhoneFactory: add makeSipPhone()