notification/drawable-anydpi-v21/ic_event_available_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="M16.53,11.06L15.47,10l-4.88,4.88 -2.12,-2.12 -1.06,1.06L10.59,17l5.94,-5.94zM19,3h-1L18,1h-2v2L8,3L8,1L6,1v2L5,3c-1.11,0 -1.99,0.9 -1.99,2L3,19c0,1.1 0.89,2 2,2h14c1.1,0 2,-0.9 2,-2L21,5c0,-1.1 -0.9,-2 -2,-2zM19,19L5,19L5,8h14v11z"/>
</vector>