Connection can not be established without camera permission

[nickvergessen]

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Steps to reproduce

1. As user A create a room with group 1 where user B is a member of
2. As user A set custom permissions for user B only change to remove the camera permission
3. As user A start a call
4. As user B try to join the call

Expected behaviour

User B can join and talk

Actual behaviour

User B is disconnecting and connecting all the time

Talk app

Talk app version: master

Custom Signaling server configured: no

Custom TURN server configured: no

Custom STUN server configured: no

Browser

Microphone available: yes - using fake stream

Camera available: yes - using fake stream

Operating system: Ubuntu

Browser name: Firefox

Browser version: 96

Browser log

[nickvergessen]

cc @danxuliu

[danxuliu]

With the HPB this is a regression (ironically) introduced in #6992 Without the HPB this was happening on v13.0.0 already 🙈 In both cases the problem is the same (only audio or only video permissions are not properly handled) and it will be implicitly fixed by the changes in #7034