Add video call not available dialog.

When telecom disconnect the video call with the code of DisconnectCause.ERROR and the DisconnectCause#getReason() of "IMS_ACCESS_BLOCKED", we should show an error dialog to user indicating that video call is not available and providing a option to make a voice call instead.

Screenshots:
https://screenshot.googleplex.com/YTUGVouoLmj
Bug: 33821263
Test: manual, VideoCallNotAvailablePromptTest
PiperOrigin-RevId: 160563754
Change-Id: Ie2eb735a92c577b5ae5a5e8b7efa2d699fc964bc