startlxqtwayland: Correctly identify Niri and Hyprland

[Conan-Kudo]

Niri is not a member of wlroots (it uses Smithay) and Hyprland is a completely independent compositor (it no longer uses wlroots).

[stefonarch]

That's true, but atm we need wlroots here to load the correct backend in the panel. If you would test your PR you would find no taskbar in the panel in both compositors.

Of course we could just copy the wlroots backend to smithhay and hyprland, but until there are no other features implemented it them it makes little sense.

[Conan-Kudo]

It does work though, since your code falls back to wlroots backend when you don't say wlroots in the string.

[Conan-Kudo]

Oh wait, I see, it looks for wlroots substring for this. Okay, I'll drop this.

[Conan-Kudo]

Actually, it seems like the logic is supposed to work, and it doesn't do what it says it does, so I made a patch to fix it: lxqt/lxqt-panel#2161