Fixed crash on Android 9 when playing a video.

app/src/main/java/com/futo/platformplayer/services/MediaPlaybackService.kt

@@ -10,6 +10,7 @@ import android.media.AudioFocusRequest
 import android.media.AudioManager
 import android.media.AudioManager.OnAudioFocusChangeListener
 import android.media.MediaMetadata
+import android.os.Build
 import android.os.IBinder
 import android.os.SystemClock
 import android.support.v4.media.MediaMetadataCompat
@@ -278,7 +279,13 @@ class MediaPlaybackService : Service() {
 
         Logger.i(TAG, "Updating notification bitmap=${if (bitmap != null) "yes" else "no."} channelId=${channel.id} icon=${icon} video=${video?.name ?: ""} playWhenReady=${playWhenReady} session.sessionToken=${session.sessionToken}");
 
-        startForeground(MEDIA_NOTIF_ID, notif, ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PLAYBACK);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            // For API 29 and above
+            startForeground(MEDIA_NOTIF_ID, notif, ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PLAYBACK);
+        } else {
+            // For API 28 and below
+            startForeground(MEDIA_NOTIF_ID, notif);
+        }
 
         _notif_last_bitmap = bitmap;
     }