DeviceLockController/res/drawable/ic_block_24px.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="20dp"
    android:height="20dp"
    android:viewportWidth="20"
    android:viewportHeight="20">
  <path
      android:pathData="M9,1.5C4.86,1.5 1.5,4.86 1.5,9C1.5,13.14 4.86,16.5 9,16.5C13.14,16.5 16.5,13.14 16.5,9C16.5,4.86 13.14,1.5 9,1.5ZM3,9C3,5.685 5.685,3 9,3C10.3875,3 11.6625,3.4725 12.675,4.2675L4.2675,12.675C3.4725,11.6625 3,10.3875 3,9ZM5.325,13.7325C6.3375,14.5275 7.6125,15 9,15C12.315,15 15,12.315 15,9C15,7.6125 14.5275,6.3375 13.7325,5.325L5.325,13.7325Z"
      android:fillColor="#5F6368"
      android:fillType="evenOdd"/>
</vector>