chromium/components/webapps/browser/android/java/res/drawable/pwa_restore_app_item_background_bottom.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright 2023 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid
        android:color="@color/pwa_bottom_sheet_card_background"/>

    <corners
        android:radius="50dp"
        android:topLeftRadius="0dp"
        android:topRightRadius="0dp"
        android:bottomLeftRadius="25dp"
        android:bottomRightRadius="25dp" />
</shape>