packages/SystemUI/res/layout/text_toast.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"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:gravity="center_vertical"
    android:maxWidth="@*android:dimen/toast_width"
    android:background="@android:drawable/toast_frame"
    android:elevation="@*android:dimen/toast_elevation"
    android:layout_marginEnd="16dp"
    android:layout_marginStart="16dp"
    android:paddingStart="16dp"
    android:paddingEnd="16dp">

    <ImageView
        android:id="@+id/icon"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"
        android:layout_marginEnd="10dp"/>
    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        android:maxLines="2"
        android:paddingTop="12dp"
        android:paddingBottom="12dp"
        android:textAppearance="@*android:style/TextAppearance.Toast"/>
</LinearLayout>