Add iOS

ios/Parsers/AVCaptureDevice.Position+descriptor.swift

@@ -0,0 +1,25 @@
+//
+//  AVCaptureDevice.Position+String.swift
+//  Cuvent
+//
+//  Created by Marc Rousavy on 15.12.20.
+//  Copyright © 2020 Facebook. All rights reserved.
+//
+
+import AVFoundation
+import Foundation
+
+extension AVCaptureDevice.Position {
+  var descriptor: String {
+    switch self {
+    case .back:
+      return "back"
+    case .front:
+      return "front"
+    case .unspecified:
+      return "unspecified"
+    @unknown default:
+      fatalError("AVCaptureDevice.Position has unknown state.")
+    }
+  }
+}