Allow for seeking outside of the app

src/components/App.tsx

@@ -24,6 +24,7 @@ export default class App extends Component<State> {
                 TrackPlayer.CAPABILITY_SKIP_TO_NEXT,
                 TrackPlayer.CAPABILITY_SKIP_TO_PREVIOUS,
                 TrackPlayer.CAPABILITY_STOP,
+                TrackPlayer.CAPABILITY_SEEK_TO,
             ]
         });
         this.setState({ isReady: true });

src/utility/PlaybackService.ts

@@ -29,4 +29,9 @@ export default async function() {
     TrackPlayer.addEventListener('remote-stop', () => {
         TrackPlayer.destroy();
     });
+
+    TrackPlayer.addEventListener('remote-seek', (event) => {
+        TrackPlayer.seekTo(event.position);
+    });
+    
 }