IMS-VT: Listen to sensor orientation changes and update camera preview

- Register to listen to OrientationEventListener

- Notify registrants of orientation changes and update camera
  preview size and orientation based on that.

- Enable the orientation listener only when CVO is enabled.

- Enable the orientation listener for video calls only. Disable it
  if we downgrade to VOLTE

Bug: 21587367
Change-Id: I1735d05ab9b76074350e7aa8deae4f35ab71c56d