background_round_padded_pressed.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:right="8dp">
        <shape android:shape="rectangle">
            <solid android:color="?attr/colorNavigationItemBackgroundPressed" />
            <corners
                android:bottomRightRadius="50dp"
                android:topRightRadius="50dp"
                />
        </shape>
    </item>
</layer-list>