data/res/layout/conversation_face_pile_layout.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 underthe License
  -->
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/conversation_face_pile"
    android:layout_width="@dimen/conversation_avatar_size"
    android:layout_height="@dimen/conversation_avatar_size"
    android:forceHasOverlappingRendering="false"
    >
    <ImageView
        android:id="@+id/conversation_face_pile_top"
        android:layout_width="@dimen/messaging_avatar_size"
        android:layout_height="@dimen/messaging_avatar_size"
        android:scaleType="centerCrop"
        android:layout_gravity="end|top"
        />
    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="start|bottom">
        <ImageView
            android:id="@+id/conversation_face_pile_bottom_background"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/conversation_badge_background"
            />
        <ImageView
            android:id="@+id/conversation_face_pile_bottom"
            android:layout_width="@dimen/messaging_avatar_size"
            android:layout_height="@dimen/messaging_avatar_size"
            android:scaleType="centerCrop"
            android:layout_gravity="center"
            />
    </FrameLayout>
</FrameLayout>