Respect Preferred Jitsi Domain

[krille-chan]

Description

As far as I can see the default Jitsi instance used is https://meet.jit.si. It would be nice if the preferred domain of the server is used if available.
It should be found at the following path /.well-known/matrix/client as:

{
  "im.vector.riot.jitsi": {
    "preferredDomain": "your.jitsi.example.org"
  }
}

It is also documented here:
https://github.com/vector-im/element-web/blob/develop/docs/jitsi.md

Additional information:

• Device: Xperia XA2
• OS and OS version: LineageOS 18.1
• Installed version of FluffyChat: 1.1.0
• (Android only) Which store are you using: Play Store
• (Android only) Are Google Services available: Yes

[github-actions]

This issue is stale because it has been open for 120 days with no activity.

[alexander-potemkin]

Guess it's stalled, because calls support removed.