Add a manifest for profile builds that enables INTERNET permission (#26450)

Profile builds need access to sockets in order to launch the Dart
observatory server.

This permission used to be enabled by default in all build types,
but was moved to a build type specific manifest in
https://github.com/flutter/flutter/commit/88b853f7eb85bf0b47e1ca4d1bf9d9a9f821730d

packages/flutter_tools/templates/app/android.tmpl/app/src/profile/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>