Merge "IMS-VT: Show Answer UI on receiving upgrade request" into nyc-dev am: d9d80c6
am: d2d5cf4

* commit 'd2d5cf44745be6023ac023673cd7d70c20591712':
  IMS-VT: Show Answer UI on receiving upgrade request

Change-Id: I8330c947311bc17516baaef88d33ba53a67e9064