IMS: Exit video mode when video call is in HOLD

- Due to sequence of updating call state changes, some times
  camera is not closed after video call moved to HOLD state
  which is due to VideoCallPresenter#onVideoCallScreenUiUnready()
  is called before VideoCallPresenter#onStateChange().
- Always exit video mode when the video call is moved to HOLD state.

Change-Id: I9839c05edfd64d8a8dc357b7f69154504cbb13f8
CRs-Fixed: 2933195
1 file changed