overlay: remove gstatic references

<?xml version="1.0" encoding="utf-8"?>

<!--

     Copyright (C) 2021 E FOUNDATION

     Licensed under the Apache License, Version 2.0 (the "License");

     you may not use this file except in compliance with the License.

     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software

     distributed under the License is distributed on an "AS IS" BASIS,

     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

     See the License for the specific language governing permissions and

     limitations under the License.

-->

<resources>

    <!-- Configuration hook for the URL returned by ConnectivityManager#getCaptivePortalServerUrl.

         If empty, the returned value is controlled by Settings.Global.CAPTIVE_PORTAL_HTTP_URL,

         and if that value is empty, the framework will use a hard-coded default.

         This is *NOT* a URL that will always be used by the system network validation to detect

         captive portals: NetworkMonitor may use different strategies and will not necessarily use

         this URL. NetworkMonitor behaviour should be configured with NetworkStack resource overlays

         instead. -->

    <!--suppress CheckTagEmptyBody -->

    <string translatable="false" name="config_networkCaptivePortalServerUrl">http://connectivity.ecloud.global</string>

</resources>