sentinel_flutter/android/app/src/debug/AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- The INTERNET permission is required for development. Specifically,
         the Flutter tool 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>