move INTERNET permission to debug/AndroidManifest.xml (#22139)

packages/flutter_tools/templates/app/android.tmpl/app/src/debug/AndroidManifest.xml.tmpl

+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="{{androidIdentifier}}">
+    <!-- Flutter needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

packages/flutter_tools/templates/app/android.tmpl/app/src/main/AndroidManifest.xml.tmpl

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="{{androidIdentifier}}">
 
-    <!-- The INTERNET permission is required for development. Specifically,
-         flutter needs it to communicate with the running application
-         to allow setting breakpoints, to provide hot reload, etc.
-    -->
-    <uses-permission android:name="android.permission.INTERNET"/>
-
     <!-- io.flutter.app.FlutterApplication is an android.app.Application that
          calls FlutterMain.startInitialization(this); in its onCreate method.
          In most cases you can leave this as-is, but you if you want to provide