packages/SystemUI/res/layout/alert_dialog_title_systemui.xml

<?xml version="1.0" encoding="utf-8"?>

<!--
  ~ Copyright (C) 2021 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:androidprv="http://schemas.android.com/apk/prv/res/android"
    android:id="@*android:id/topPanel"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:paddingStart="@dimen/dialog_side_padding"
    android:paddingEnd="@dimen/dialog_side_padding"
>

    <!-- If the client uses a customTitle, it will be added here. -->

    <LinearLayout
        android:id="@*android:id/title_template"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:gravity="center_horizontal|top">

        <ImageView
            android:id="@*android:id/icon"
            android:layout_width="32dp"
            android:layout_height="32dp"
            android:layout_marginBottom="16dp"
            android:scaleType="fitCenter"
            android:src="@null"
            android:tint="?androidprv:attr/colorAccentPrimaryVariant"
            />

        <TextView
            android:id="@*android:id/alertTitle"
            android:ellipsize="end"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="16dp"
            style="@style/TextAppearance.Dialog.Title" />
    </LinearLayout>

    <Space
        android:id="@*android:id/titleDividerNoCustom"
        android:visibility="gone"
        android:layout_width="match_parent"
        android:layout_height="0dp" />
</LinearLayout>