sdk/platforms/android-27/data/res/layout/accessibility_button_chooser.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
* Copyright 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.
*/
-->
<com.android.internal.widget.ResolverDrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:maxWidth="@dimen/resolver_max_width"
    android:maxCollapsedHeight="256dp"
    android:maxCollapsedHeightSmall="56dp"
    android:id="@id/contentPanel">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alwaysShow="true"
        android:orientation="vertical"
        android:background="?attr/colorBackground"
        android:paddingTop="8dp"
        android:paddingBottom="8dp"
        android:paddingStart="?attr/dialogPreferredPadding"
        android:paddingEnd="?attr/dialogPreferredPadding">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:minHeight="56dp"
            android:textAppearance="?attr/textAppearanceMedium"
            android:text="@string/accessibility_button_prompt_text"
            android:gravity="start|center_vertical"
            android:layout_alignParentStart="true"
            android:paddingTop="8dp"
            android:paddingBottom="8dp"/>

        <GridView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/accessibility_button_chooser_grid"
            android:columnWidth="90dp"
            android:numColumns="auto_fit"
            android:verticalSpacing="10dp"
            android:horizontalSpacing="10dp"
            android:stretchMode="columnWidth"
            android:gravity="center"/>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/accessibility_button_prompt"
            android:textAppearance="?attr/textAppearanceMedium"
            android:text="@string/accessibility_button_instructional_text"
            android:gravity="start|center_vertical"
            android:paddingTop="8dp"
            android:paddingBottom="8dp"
            android:visibility="gone"/>
    </LinearLayout>
</com.android.internal.widget.ResolverDrawerLayout>