IMS: Disable Consultative ECT across subs on UI

- Disable the Consultative Transfer option if Active call
  and Secondary call on HUN banner are on different subs.
- Add handling of fail case, when HELD call is ended remotely.

Change-Id: I46ce3e1cf1102d9f641d9ac8e99253542ac2b98f
CRs-Fixed: 3059935
1 file changed