packages/SystemUI/res-keyguard/drawable/bubble_minute_hand.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:height="340dp"
    android:width="340dp"
    android:viewportHeight="340"
    android:viewportWidth="340">
    <path
        android:pathData="M170,1L170,1A39,39 0,0 1,209 40L209,130A39,39 0,0 1,170 169L170,169A39,39 0,0 1,131 130L131,40A39,39 0,0 1,170 1z"
        android:strokeColor="#000000"
        android:strokeWidth="3"/>
</vector>