1:1 VoIP call doesn't terminate (and cannot be terminated) when user is banned

### Steps to reproduce

[Discovered on web](https://github.com/vector-im/element-web/issues/25681) but the same problem manifests (a little bit differently) on Android.

When you're banned from a room (or kicked presumably) any active call in that room should terminate.

On Android at least the banned user can still terminate the call.

### Outcome

#### What did you expect?
Call to terminate after being banned

#### What happened instead?
Call continued!

### Your phone model

Some sort of nokia

### Operating system version

Android

### Application version and app store

Just downloaded just this second

### Homeserver

matrix.org

### Will you send logs?

No

### Are you willing to provide a PR?

No

Start by reproducing the Android scenario: keep a 1:1 VoIP call active, then ban or kick a participant from the room, and observe both clients. Trace the call lifecycle around the room membership change; done means the call terminates after the ban or kick and the banned user cannot keep the call active.

Written by the indexing model from the issue text.