build: 控制端功能移植到flutter版本

webrtc_controller_flutter/android/app/build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     id("com.android.application")
+    id("kotlin-android")
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id("dev.flutter.flutter-gradle-plugin")
 }

webrtc_controller_flutter/android/app/src/main/AndroidManifest.xml

@@ -1,8 +1,13 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- 远程控制需要通过网络（含 ws:// 明文）连接信令服务器 -->
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
     <application
         android:label="webrtc_controller_flutter"
         android:name="${applicationName}"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/ic_launcher"
+        android:usesCleartextTraffic="true">
         <activity
             android:name=".MainActivity"
             android:exported="true"