testapps/ImsTestService/res/layout/activity_calling.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2017 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
  -->

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:paddingLeft="4dp">

    <GridLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:columnCount="2" android:rowCount="2">

        <CheckBox
            android:id="@+id/call_cap_voice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:layout_column="0"
            android:layout_gravity="center" android:layout_row="0"
            android:text="@string/calling_cap_voice"/>
        <CheckBox
            android:id="@+id/call_cap_video"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:layout_column="1"
            android:layout_gravity="center" android:layout_row="0"
            android:text="@string/calling_cap_video"/>
        <CheckBox
            android:id="@+id/call_cap_ut"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:layout_column="0"
            android:layout_gravity="center" android:layout_row="1"
            android:text="@string/calling_cap_ut"/>
        <CheckBox
            android:id="@+id/call_cap_sms"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:layout_column="1"
            android:layout_gravity="center" android:layout_row="1"
            android:text="@string/calling_cap_sms"/>
    </GridLayout>
    <Button
        android:id="@+id/call_cap_change"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/calling_cap_change_button" />

    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="?android:attr/listDivider"
        android:paddingRight="4dp"/>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" android:text="@string/calling_cap_enabled_text"
        android:textStyle="bold"/>
    <TextView
        android:id="@+id/call_cap_enabled_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" android:text=""/>


</LinearLayout>