Also unifies the mock inheritance if they inherited from a ref counted
interface:
- it should only inherit from the interface
- it should use make_ref_counted
Bug: webrtc:14594
Change-Id: I7b0514b632ccd0798028b50f19812ac0a196e13c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/262423
Commit-Queue: Florent Castelli <orphis@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38602}
e87ec28b80