VoIP call rings on caller side but call is not send to called person, user not notified about failed call

### Steps to reproduce

1. Start a VoIP call with camera
2. Element displays the call as "ringing" but the other side of the call is not notified and does not see the call.
3. **Restart element**
4. Start a VoIP call with camera
5. Element displays the call as "ringing" + the other side of the call gets notified and can answer the call.

### Outcome

#### What did you expect?
- An error message should be shown to the user if a call could not be send (e.g. because of a audio/video device still reserved by another application)
- The call should get cancelled on the initiators side if an error occurs

#### What happened instead?
- Call is in an unhealthy state. The user is not informed and waits for the called person to answer the call. But the called person does not see the call and thus can not answer it. -> Big confusion on user side.

### Operating system

Windows

### Application version

1.10.7

### How did you install the app?

From element.io downloads section

### Homeserver

non-public Synapse 1.51.0

### Will you send logs?

No