overlay/frameworks/base/core/res/res/values/config.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
** Copyright 2012, 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:xliff="urn:oasis:names:tc:xliff:document:1.2">

    <!-- Whether a software navigation bar should be shown. NOTE: in the future this may be
         autodetected from the Configuration. -->
    <bool name="config_showNavigationBar">true</bool>

    <!-- List of regexpressions describing the interface (if any) that represent tetherable
         USB interfaces.  If the device doesn't want to support tething over USB this should
         be empty.  An example would be "usb.*" -->
    <string-array translatable="false" name="config_tether_usb_regexs">
        <item>"usb\\d"</item>
    </string-array>

    <!-- List of regexpressions describing the interface (if any) that represent tetherable
         Wifi interfaces.  If the device doesn't want to support tethering over Wifi this
         should be empty.  An example would be "softap.*" -->
    <string-array translatable="false" name="config_tether_wifi_regexs">
        <item>"softap.*"</item>
    </string-array>

    <!-- Array of allowable ConnectivityManager network types for tethering -->
    <integer-array translatable="false" name="config_tether_upstream_types">
        <item>0</item>
        <item>1</item>
        <item>5</item>
    </integer-array>

</resources>