Should not display "video message" feature when no webcam is detected

Describe your environment

Please specify the following:

• OS: Ubuntu 22.04
• Jami version: 202312211550
• What build you are using: from ubuntu software

Additional information

I don't have camera connected to my computer during this test.

This bug can cause a crash if I try to record (so please also take care to add a fallback here).

Kazam_screencast_00010.webm

added bug UI/UX labels

changed the description

I can see this bug in some other places:

Customize profile

Create swarm group

assigned to @cberthet

mentioned in commit 2215d51f

closed