app/src/main/res/drawable/round_corner.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/colorPrimary" />
    <corners
        android:topRightRadius="72dp"
        android:bottomRightRadius="72dp" />
</shape>