Use Received Uri as Gateway Uri

Gateway information is the core component to perform redirection.
We should clarify the uri we received from
 CallRedirectionService is gateway Uri. And apply it in Telecom.

Test: Treehugger; Manual
Bug: 130048865
Change-Id: I3599377406b88751ee11139e9a1aa5afab734f7c
Merged-In: I3599377406b88751ee11139e9a1aa5afab734f7c