Windows reports "Microphone in use by Element" when in the lobby screen state.

### Steps to reproduce

The system "Microphone in use by: Element" is triggered even when the user is not on calls when the following conditions are met:

- Element desktop client is running
- On Windows 11 (not sure about other O/S)
- User has a video room open in the rooms/chats selector
-- regardless of whether they have joined the call
-- regardless of whether the UI window is closed

This is concerning from a number of angles, including privacy.

### Outcome

Microphone should only be enabled when the user has joined a call, for the duration the user is on the call.

### Operating system

Windows 11

### Application version

1.12.3

### How did you install the app?

https://element.io/download

### Homeserver

matrix.org

### Will you send logs?

No