Do not remove local video capabilities for Wifi call when mobile data is off

- When we get a notification that mobile data has been enabled/disabled
  we notify the connections of the change

- Remove video capability only for LTE calls when mobile data change is
  reported to ImsPhoneConnection

Test: Manual
Bug: 70292536
Change-Id: I78cb34b0def3d3150804b6e2ece12b3dbd94b10f