Record black screen if windowing system is Wayland (Ubuntu 22.04)

[PeiYao Chang]

[Summary]
User will record the black screen with sound and mice pointer if the Windowing System is Wayland on Ubuntu 22.04.

There's no problem if user switch back to X11 windowing system.

[Steps to reproduce]
1. Install Ubuntu 22.04
2. Boot into OS
3. Check the Windowing System is Wayland via Gnome -> Settings -> About page
4. Record the screen by Kazam

[Expected result]
Kazam can record the screen

[Actual result]
Black screen with sound and mice pointer actually

[Failure rate]
Always

[PeiYao Chang (baconyao)]

DP: https://bugs.launchpad.net/kazam/+bug/1952232

[niknah (hankin0)]

There are multiple problems with the new Gnome & Wayland

* Can't record full screen. Full screen recording is disallowed in Wayland...
https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/826

* Can't pick a window to record because Wnck doesn't support Wayland. This is the same reason why xfce, mate doesn't run on Wayland.

* Can't use the Ctrl-Windows-Q,F,R,W keys because Wayland doesn't support global hotkeys. You can get these to work by starting with `GDK_BACKEND=x11 kazam`

* They have removed the indicator in the new gnome so you can't click on the toolbar icon to stop the recording. To get around this, you'll have to install the appindicators extension...
https://extensions.gnome.org/extension/615/appindicator-support/