packages/SystemUI/res/layout/bubble_stack_user_education.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.
  -->
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/user_education_view"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:paddingTop="48dp"
    android:paddingBottom="48dp"
    android:paddingStart="@dimen/bubble_stack_user_education_side_inset"
    android:paddingEnd="16dp"
    android:layout_marginEnd="24dp"
    android:orientation="vertical"
    android:background="@drawable/bubble_stack_user_education_bg">

    <TextView
        android:id="@+id/user_education_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingBottom="16dp"
        android:fontFamily="@*android:string/config_bodyFontFamilyMedium"
        android:maxLines="1"
        android:text="@string/bubbles_user_education_title"
        android:textAppearance="@*android:style/TextAppearance.DeviceDefault.Headline"/>

    <TextView
        android:id="@+id/user_education_description"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/bubbles_user_education_description"
        android:fontFamily="@*android:string/config_bodyFontFamily"
        android:textAppearance="@*android:style/TextAppearance.DeviceDefault.Body2"/>

</LinearLayout>