Exiting a call left the camera on

### Steps to reproduce

1. I joined https://call.guest.ess-ecall-poc.ems-support.element.dev/room/#/Knock?roomId=%21kZfediMOZQzfcRWOZN%3Aess-ecall-poc.ems-support.element.dev&perParticipantE2EE=true&viaServers=ess-ecall-poc.ems-support.element.dev
2. I knocked
3. I joined
4. I parted
5. The camera was left on

### Outcome

#### What did you expect?

Camera should only ever be on if it is actually capturing for a preview or to send to someone else

#### What happened instead?

Spooky scary camera LED

### Operating system

_No response_

### Browser information

124.0.6367.62 (Official Build) (arm64)

### URL for webapp

call.guest.ess-ecall-poc.ems-support.element.dev

### Will you send logs?

Yes