nixpkgs/nixos/modules/services/desktops/pipewire

Updating

1. Update the version & hash in pkgs/development/libraries/pipewire/default.nix
2. run nix build -f /path/to/nixpkgs/checkout pipewire pipewire.mediaSession
3. copy all JSON files from result/etc/pipewire and result-mediaSession/etc/pipewire/media-session.d to this directory
4. add new files to the module config and passthru tests