use track's id of linked_from if exists (#286)

Resolves #285 
Resolves #282

Spotify uses [Track Relinking](https://developer.spotify.com/documentation/web-api/concepts/track-relinking) to re-link a track to a different version of the same track if it's unavailable in user's market while the other version is available.

Because of this relinking process, the linked track's ID is returned by the Spotify APIs instead of the original track's ID. This makes starting a playback in a context (e.g album, playlist, etc) with the linked track's ID failed because Spotify cannot find a track with that ID in the context.

This PR updates the track conversion code to use the original track's ID if it's relinked.

Author: aome510

spotify_player/src/state/model.rs

@@ -254,8 +254,12 @@ impl Track {
     /// tries to convert from a `rspotify_model::SimplifiedTrack` into `Track`
     pub fn try_from_simplified_track(track: rspotify_model::SimplifiedTrack) -> Option<Self> {
         if track.is_playable.unwrap_or(true) {
+            let id = match track.linked_from {
+                Some(d) => d.id,
+                None => track.id?,
+            };
             Some(Self {
-                id: track.id?,
+                id,
                 name: track.name,
                 artists: from_simplified_artists_to_artists(track.artists),
                 album: None,
@@ -271,8 +275,12 @@ impl Track {
     /// tries to convert from a `rspotify_model::FullTrack` into `Track`
     pub fn try_from_full_track(track: rspotify_model::FullTrack) -> Option<Self> {
         if track.is_playable.unwrap_or(true) {
+            let id = match track.linked_from {
+                Some(d) => d.id,
+                None => track.id?,
+            };
             Some(Self {
-                id: track.id?,
+                id,
                 name: track.name,
                 artists: from_simplified_artists_to_artists(track.artists),
                 album: Album::try_from_simplified_album(track.album),