overlay/frameworks/base/packages/SystemUI/res/values/config.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
** Copyright 2009, The Android Open Source Project
** Copyright 2019-2022 Fairphone B.V.
**
** 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>

    <!-- Tiles native to System UI. Order should match "quick_settings_tiles_default" -->
    <string name="quick_settings_tiles_stock" translatable="false">
        internet,bt,flashlight,dnd,alarm,airplane,nfc,controls,wallet,rotation,battery,cast,screenrecord,mictoggle,cameratoggle,location,hotspot,inversion,saver,dark,work,night,reverse,reduce_brightness,qr_code_scanner,onehanded,color_correction,dream
    </string>

    <!-- Whether to show activity indicators in the status bar -->
    <bool name="config_showActivity">true</bool>

    <!-- A collection of defaults for the quick affordances on the lock screen. Each item must be a
    string with two parts: the ID of the slot and the comma-delimited list of affordance IDs,
    separated by a colon ':' character. For example: <item>bottom_end:home,wallet</item>. The
    default is displayed by System UI as long as the user hasn't made a different choice for that
    slot. If the user did make a choice, even if the choice is the "None" option, the default is
    ignored. -->
    <string-array name="config_keyguardQuickAffordanceDefaults" translatable="false">
        <item>bottom_start:home</item>
        <item>bottom_end:qr_code_scanner</item>
    </string-array>

</resources>