tachiyomi/app/src/main/res/drawable/ic_chrome_reader_mode_24dp.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24">
    <path
        android:fillColor="@android:color/black"
        android:pathData="M21,4L3,4c-1.1,0 -2,0.9 -2,2v13c0,1.1 0.9,2 2,2h18c1.1,0 2,-0.9 2,-2L23,6c0,-1.1 -0.9,-2 -2,-2zM3,19L3,6h8v13L3,19zM21,19h-8L13,6h8v13zM14,9.5h6L20,11h-6zM14,12h6v1.5h-6zM14,14.5h6L20,16h-6z" />
</vector>