KTC/app/src/main/res/drawable/shape_top_toolbar.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="?cardBackgroundColor" />
    <corners
        android:bottomLeftRadius="16dp"
        android:bottomRightRadius="16dp"
        />
</shape>