Validation added in iOS

Validation added for bluetooth headphones as it was returning BluetoothA2DP as a route. Tested in Unity 2019.1

Author: iamsidv

Assets/Plugins/iOS/DetectHeadset.mm

@@ -11,10 +11,14 @@ bool _Detect() {
                 return true;
             if ([[desc portType] isEqualToString:AVAudioSessionPortBluetoothHFP])
                 return true;
+	    //It was displaying this route for bluetooth wireless headphones.
+            //Tested with Unity 2019.1
+            if ([[desc portType] isEqualToString:AVAudioSessionPortBluetoothA2DP])
+                return true;
         }
 
         return false;
 
 	}
 
-}
+}