packages/CarSystemUI/res/layout/car_user_switching_dialog.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.
  -->
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:fitsSystemWindows="true"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:background="@color/car_user_switching_dialog_background_color">
  <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="vertical"
      android:layout_gravity="center"
      android:gravity="center_horizontal">
    <ImageView
        android:id="@+id/user_loading_avatar"
        android:layout_width="@dimen/car_fullscreen_user_pod_image_avatar_width"
        android:layout_height="@dimen/car_fullscreen_user_pod_image_avatar_height"/>

    <TextView
        android:id="@+id/user_loading"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/car_user_switching_dialog_loading_text_margin_top"
        android:textSize="@dimen/car_user_switching_dialog_loading_text_font_size"
        android:textColor="@color/car_user_switching_dialog_loading_text_color"
        android:layout_below="@id/user_loading_avatar"/>
  </LinearLayout>
</FrameLayout>