notification/drawable-anydpi-v21/ic_do_not_disturb_black_24dp.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="24dp"
        android:height="24dp"
        android:viewportWidth="24.0"
        android:viewportHeight="24.0">
    <path
        android:fillColor="#FF000000"
        android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM12,20c-4.42,0 -8,-3.58 -8,-8 0,-1.85 0.63,-3.55 1.69,-4.9L16.9,18.31C15.55,19.37 13.85,20 12,20zM18.31,16.9L7.1,5.69C8.45,4.63 10.15,4 12,4c4.42,0 8,3.58 8,8 0,1.85 -0.63,3.55 -1.69,4.9z"/>
</vector>