Second mic track published (bug 2)

### Steps to reproduce

Somehow it is still possible to get two audio tracks published. I've just observed this in Firefox when adding multiple audio devices, unplugging them and then plugging them back in again. Muting caused on capture device to be muted, but obviously not the other.

### Outcome

#### What did you expect?

#### What happened instead?

### Operating system

_No response_

### Browser information

_No response_

### URL for webapp

_No response_

### Will you send logs?

Yes

The issue names no files, tests, or entry points. Start by reproducing the Firefox scenario with multiple audio devices, unplugging and reconnecting them, then check how published audio tracks and muting behave; done means only one audio track remains published and muting affects the active capture.

Written by the indexing model from the issue text.