fix back handler dying on unsub

also remove need for unsub

app/playbackservice.ts

@@ -21,10 +21,8 @@ const setCurrentTrackIdx = (idx?: number) => {
   })
 }
 
-module.exports = async function () {
+let serviceCreated = false
-  const unsubs: (() => void)[] = []
+const createService = async () => {
-
-  unsubs.push(
   useStore.subscribe(
     (currentTrack?: TrackExt) => {
       if (currentTrack) {
@@ -32,19 +30,13 @@ module.exports = async function () {
       }
     },
     state => state.currentTrack,
-    ),
   )
 
-  const { emitter } = TrackPlayer.addEventListener(Event.RemoteStop, () => {
+  TrackPlayer.addEventListener(Event.RemoteStop, () => {
-    for (const unsub of unsubs) {
-      unsub()
-    }
     reset()
     trackPlayerCommands.enqueue(TrackPlayer.destroy)
   })
 
-  unsubs.push(() => emitter.removeAllListeners())
-
   TrackPlayer.addEventListener(Event.RemotePlay, () => trackPlayerCommands.enqueue(TrackPlayer.play))
   TrackPlayer.addEventListener(Event.RemotePause, () => trackPlayerCommands.enqueue(TrackPlayer.pause))
 
@@ -91,3 +83,10 @@ module.exports = async function () {
     setCurrentTrackIdx(useStore.getState().currentTrackIdx)
   })
 }
+
+module.exports = async function () {
+  if (!serviceCreated) {
+    createService()
+    serviceCreated = true
+  }
+}