device/drawable-anydpi-v21/ic_signal_cellular_off_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="M21,1l-8.59,8.59L21,18.18V1zM4.77,4.5L3.5,5.77l6.36,6.36L1,21h17.73l2,2L22,21.73 4.77,4.5z"/>
</vector>