title: Can not show album artwork on Carplay music
body: <p>I'm building an iOS Music app that can integrate with Apple Carplay, i can play music on Carplay normally and can display some information of song such as title, album, artist name. However can not display album artwork.</p>
  <p>This is bulk code for display media information on Carplay:</p>
  <pre><code>     if let nowPlayingItem: PlaylistItem = self.nowPlayingItem {
          let info: NSMutableDictionary = NSMutableDictionary()
          info[MPMediaItemPropertyArtist] = nowPlayingItem.mediaItem?.artist?.name
          info[MPMediaItemPropertyAlbumTitle] = nowPlayingItem.mediaItem?.album?.title
          info[MPMediaItemPropertyTitle] = nowPlayingItem.mediaItem?.title
          info[MPMediaItemPropertyPlaybackDuration] = nowPlayingItem.mediaItem?.playbackDuration
          info[MPMediaItemPropertyArtwork] = nowPlayingItem.mediaItem?.artwork()
          let sec: TimeInterval = CMTimeGetSeconds(time)
          info[MPNowPlayingInfoPropertyElapsedPlaybackTime] = Int(sec)
          MPNowPlayingInfoCenter.default().nowPlayingInfo = info as? [String: Any]
      }
  </code></pre>
  <p>This is my current app:</p>
  <p><a href="https://i.stack.imgur.com/jCP0L.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jCP0L.png" alt="enter image description here" /></a></p>
  <p>And this is what i want :</p>
  <p><a href="https://i.stack.imgur.com/P2vm2.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/P2vm2.jpg" alt="enter image description here" /></a></p>
  <p>So what i have to do ? Please help me to find solution for this.</p>