Calls fails to negotiate for a second time

### Steps to reproduce

1. Have both WiFi and Cell connected
2. Be in a video call
3. Turn off WiFi
4. Notice element is trying to connect the call
5. Call resumes over cellular
6. Wait a bit
7. Connect WiFi
8. Wait for android to force element to use WiFi for network traffic
9. Element returns to trying to connect
10. Notice element does not send a call setup request

### Outcome

#### What did you expect?

Element can maintain a call regardless of network swapping.

#### What happened instead?

Element does not send call negotiations during the second network swap.

Killing the app will lead the the call being stuck with a "Hang up" button. Instead of a "reconnect" button.

### Your phone model

OP8T

### Operating system version

11.0

### Application version and app store

1.4.19 [40104190] (F-4ea2b193)

### Homeserver

matrix.org

### Will you send logs?

Yes

### Are you willing to provide a PR?

No