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

* commit 'd9d80c625710686ec055c902077003450748a313':
  IMS-VT: Show Answer UI on receiving upgrade request

Change-Id: Icb25b8de877d3eb7f1d9703368afd88c2edc09fe