service: fix release memory leaks

app/src/main/java/org/oxycblt/auxio/music/service/Indexer.kt

@@ -90,10 +90,10 @@ private constructor(
 
     fun release() {
         contentObserver.release()
-        musicSettings.registerListener(this)
-        musicRepository.addIndexingListener(this)
-        musicRepository.addUpdateListener(this)
+        musicRepository.unregisterWorker(this)
         musicRepository.removeIndexingListener(this)
+        musicRepository.removeUpdateListener(this)
+        musicSettings.unregisterListener(this)
     }
 
     override fun requestIndex(withCache: Boolean) {

app/src/main/java/org/oxycblt/auxio/playback/service/MediaSessionHolder.kt

@@ -113,9 +113,9 @@ private constructor(
      */
     fun release() {
         bitmapProvider.release()
+        playbackManager.removeListener(this)
         playbackSettings.unregisterListener(this)
         imageSettings.unregisterListener(this)
-        playbackManager.removeListener(this)
         mediaSession.apply {
             isActive = false
             release()

app/src/main/java/org/oxycblt/auxio/playback/service/PlaybackServiceFragment.kt

@@ -107,11 +107,11 @@ private constructor(
 
     fun release() {
         waitJob.cancel()
+        playbackManager.removeListener(this)
+        systemReceiver.release()
         widgetComponent.release()
-        context.unregisterReceiver(systemReceiver)
         sessionHolder.release()
         exoHolder.release()
-        playbackManager.removeListener(this)
     }
 
     override fun onSessionEnded() {