test(windows): serialize media player environment access (#2619)

src/sound.rs

@@ -450,6 +450,7 @@ mod tests {
     #[cfg(windows)]
     #[test]
     fn windows_media_player_reports_invalid_media_without_waiting_for_timeout() {
+        let _lock = crate::integration::integration_env_lock();
         let path = temp_sound_path();
         std::fs::write(&path, b"not an mp3").unwrap();
         let output = run_windows_player(&path).unwrap();