Fix bug iOS AudioPlayer where multiple calls to setupRemoteTransportControls resulted in duplicate MPRemoteCommand targets being applied for the same action.

ios/App/Shared/player/AudioPlayer.swift

@@ -584,6 +584,7 @@ class AudioPlayer: NSObject {
         let jumpBackwardsTime = deviceSettings.jumpBackwardsTime
         
         commandCenter.playCommand.isEnabled = true
+        commandCenter.playCommand.removeTarget(nil)
         commandCenter.playCommand.addTarget { [weak self] event in
             guard let strongSelf = self else { return .commandFailed }
             if strongSelf.isPlaying() {
@@ -595,6 +596,7 @@ class AudioPlayer: NSObject {
         }
 
         commandCenter.pauseCommand.isEnabled = true
+        commandCenter.pauseCommand.removeTarget(nil)
         commandCenter.pauseCommand.addTarget { [weak self] event in
             guard let strongSelf = self else { return .commandFailed }
             if strongSelf.isPlaying() {
@@ -606,6 +608,7 @@ class AudioPlayer: NSObject {
         }
 
         commandCenter.togglePlayPauseCommand.isEnabled = true
+        commandCenter.togglePlayPauseCommand.removeTarget(nil)
         commandCenter.togglePlayPauseCommand.addTarget { [weak self] event in
             guard let strongSelf = self else { return .commandFailed }
             if strongSelf.isPlaying() {
@@ -617,6 +620,7 @@ class AudioPlayer: NSObject {
         }
         
         commandCenter.skipForwardCommand.isEnabled = true
+        commandCenter.skipForwardCommand.removeTarget(nil)
         commandCenter.skipForwardCommand.preferredIntervals = [NSNumber(value: jumpForwardTime)]
         commandCenter.skipForwardCommand.addTarget { [weak self] event in
             guard let command = event.command as? MPSkipIntervalCommand else {
@@ -629,6 +633,7 @@ class AudioPlayer: NSObject {
             return .success
         }
         commandCenter.skipBackwardCommand.isEnabled = true
+        commandCenter.skipBackwardCommand.removeTarget(nil)
         commandCenter.skipBackwardCommand.preferredIntervals = [NSNumber(value: jumpBackwardsTime)]
         commandCenter.skipBackwardCommand.addTarget { [weak self] event in
             guard let command = event.command as? MPSkipIntervalCommand else {
@@ -642,6 +647,7 @@ class AudioPlayer: NSObject {
         }
         
         commandCenter.nextTrackCommand.isEnabled = true
+        commandCenter.nextTrackCommand.removeTarget(nil)
         commandCenter.nextTrackCommand.addTarget { [weak self] _ in
             guard let currentTime = self?.getCurrentTime() else {
                 return .commandFailed
@@ -650,6 +656,7 @@ class AudioPlayer: NSObject {
             return .success
         }
         commandCenter.previousTrackCommand.isEnabled = true
+        commandCenter.previousTrackCommand.removeTarget(nil)
         commandCenter.previousTrackCommand.addTarget { [weak self] _ in
             guard let currentTime = self?.getCurrentTime() else {
                 return .commandFailed
@@ -659,6 +666,7 @@ class AudioPlayer: NSObject {
         }
 
         commandCenter.changePlaybackPositionCommand.isEnabled = deviceSettings.allowSeekingOnMediaControls
+        commandCenter.changePlaybackPositionCommand.removeTarget(nil)
         commandCenter.changePlaybackPositionCommand.addTarget { [weak self] event in
             guard let event = event as? MPChangePlaybackPositionCommandEvent else {
                 return .noSuchContent
@@ -676,6 +684,7 @@ class AudioPlayer: NSObject {
         }
         
         commandCenter.changePlaybackRateCommand.isEnabled = true
+        commandCenter.changePlaybackRateCommand.removeTarget(nil)
         commandCenter.changePlaybackRateCommand.supportedPlaybackRates = [0.5, 0.75, 1.0, 1.25, 1.5, 2]
         commandCenter.changePlaybackRateCommand.addTarget { [weak self] event in
             guard let event = event as? MPChangePlaybackRateCommandEvent else {