fix(ios): 用系统网络请求唤起无线数据选择

Flutter 的接口请求不会触发系统选择框，进入前台后补一次 URLSession 请求。

ios/Runner/SceneDelegate.swift

@@ -1,6 +1,11 @@
+// Author: fruit.com.cn
+
 import Flutter
 import UIKit
 
 class SceneDelegate: FlutterSceneDelegate {
-
+  override func sceneDidBecomeActive(_ scene: UIScene) {
+    super.sceneDidBecomeActive(scene)
+    (UIApplication.shared.delegate as? AppDelegate)?.requestWirelessDataPrompt()
+  }
 }