res/values/overlayable.xml

<?xml version="1.0" encoding="utf-8" ?>
<!-- Copyright (C) 2019 The Android Open Source Project

     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 xmlns:android="http://schemas.android.com/apk/res/android">
    <overlayable name="NetworkStackConfig">
        <policy type="product|system|vendor">
            <!-- Configuration values for NetworkMonitor -->
            <item type="integer" name="config_captive_portal_dns_probe_timeout"/>
            <item type="string" name="config_captive_portal_http_url"/>
            <item type="string" name="config_captive_portal_https_url"/>
            <item type="array" name="config_captive_portal_fallback_urls"/>
            <item type="bool" name="config_no_sim_card_uses_neighbor_mcc"/>
            <!-- Configuration value for DhcpResults -->
            <item type="array" name="config_default_dns_servers"/>
            <!-- Configuration for including DHCP client hostname option.
            If this option is true, client hostname set in Settings.Global.DEVICE_NAME will be
            included in DHCPDISCOVER/DHCPREQUEST, otherwise, the DHCP hostname option will not
            be sent. RFC952 and RFC1123 stipulates an valid hostname should be only comprised of
            'a-z', 'A-Z' and '-', and the length should be up to 63 octets or less (RFC1035#2.3.4),
            platform will perform best-effort transliteration for other characters. Anything that
            could be used to identify the device uniquely is not recommended, e.g. user's name,
            random number and etc.
            -->
            <item type="bool" name="config_dhcp_client_hostname"/>
            <!-- Customized neighbor unreachable probe parameters.
            Legal config_*_num value should be in the range of 5-15; and config_*_interval value
            should be in the range of 750-1000ms.
            -->
            <item type="integer" name="config_nud_steadystate_solicit_num"/>
            <item type="integer" name="config_nud_steadystate_solicit_interval"/>
            <item type="integer" name="config_nud_postroaming_solicit_num"/>
            <item type="integer" name="config_nud_postroaming_solicit_interval"/>
        </policy>
    </overlayable>
</resources>