The function `emms-browser-add-tracks-and-play' switches tracks before invoking `emms-stop'. This causes the hooks in `emms-player-stopped-hook' to run after the current track has changed. This means that, when `emms-listenbrainz-scrobbler-stop-hook' is called, it submits the track we switched to, not the track that's playing.
This patch fixes that by storing the relevant track instead of depending on the currently playing track.
