Add the resetIms interface between framework and ImsService.

Add the resetIms interface between framework and ImsService.

Bug: b/268251541
Test: atest ImsEnablementTrackerTest
Test:
1. AT&T activated, Fi deactivated
2. AT&T activated, Fi activated
3. AT&T deactivated, Fi activated
4. AT&T activated, Fi activated
5. repeat from step 1

Merged-In: I673da788e9fcaf20b494f45d308d0456981b9e92
Change-Id: I673da788e9fcaf20b494f45d308d0456981b9e92
(cherry picked from commit ce241f2c)