Fixed code style, reduced condition checking

Author: Guichaguri

ios/RNTrackPlayer/RNTrackPlayer.swift

@@ -185,7 +185,7 @@ public class RNTrackPlayer: RCTEventEmitter {
         player.event.playbackEnd.addListener(self) { [weak self] reason in
             guard let `self` = self else { return }
 
-            if (reason == .playedUntilEnd) {
+            if reason == .playedUntilEnd {
                 // playbackEnd is called twice at the end of a track;
                 // we ignore .skippedToNext and only fire an event
                 // for .playedUntilEnd
@@ -194,14 +194,15 @@ public class RNTrackPlayer: RCTEventEmitter {
                     "position": self.player.currentTime,
                     "nextTrack": (self.player.nextItems.first as? Track)?.id,
                     ])
+                
+                if self.player.nextItems.count == 0 {
+                    self.sendEvent(withName: "playback-queue-ended", body: [
+                        "track": (self.player.currentItem as? Track)?.id,
+                        "position": self.player.currentTime,
+                        ])
+                }
             }
 
-            if reason == .playedUntilEnd && self.player.nextItems.count == 0 {
-                self.sendEvent(withName: "playback-queue-ended", body: [
-                    "track": (self.player.currentItem as? Track)?.id,
-                    "position": self.player.currentTime,
-                    ])
-            }
         }
 
         player.remoteCommandController.handleChangePlaybackPositionCommand = { [weak self] event in