overlay/packages/services/Telephony/res/values/config.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2020 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.
-->

<!-- Phone app resources that may need to be customized
     for different hardware or product builds. -->
<resources>
    <!-- String indicating the package name of the device ImsService implementation for MMTEL. -->
    <string name="config_ims_mmtel_package">com.shannon.imsservice</string>

    <!-- String indicating the package name of the device ImsService implementation for RCS. -->
    <string name="config_ims_rcs_package">com.shannon.rcsservice</string>

    <!-- Flag indicating whether the device supports RTT (real-time text) -->
    <bool name="config_support_rtt">true</bool>

    <!-- Show enabled lte option for lte device -->
    <bool name="config_enabled_lte" translatable="false">true</bool>

    <!-- String indicating the package name of the device GbaService implementation. -->
    <string name="config_gba_package" translatable="false">com.shannon.rcsservice</string>

    <!-- This device requires that emergency calls are placed over the default data SIM.
         This is done mainly to avoid placing emergency calls over CROSS SIM when even
         though it's the default voice SIM. -->
    <bool name="config_gnss_supl_requires_default_data_for_emergency">true</bool>
</resources>