packages/SystemUI/res/layout/bubble_overflow_view.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/bubble_overflow_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <com.android.systemui.bubbles.BadgedImageView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/bubble_view"
        android:layout_gravity="center"
        android:layout_width="@dimen/individual_bubble_size"
        android:layout_height="@dimen/individual_bubble_size"/>

    <TextView
        android:id="@+id/bubble_view_name"
        android:textAppearance="@*android:style/TextAppearance.DeviceDefault.ListItem"
        android:textSize="13sp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:maxLines="1"
        android:lines="2"
        android:ellipsize="end"
        android:layout_gravity="center"
        android:paddingTop="@dimen/bubble_overflow_text_padding"
        android:gravity="center"/>
</LinearLayout>