community/pipewire: disable xdg autostart for gnome under systemd
Starting pipewire as a user service under systemd is more reliable than using gnome-session to xdg autostart it, so this option tells gnome-session to ignore it.
Starting pipewire as a user service under systemd is more reliable than using gnome-session to xdg autostart it, so this option tells gnome-session to ignore it.