google-material-design-icons/android/content/inbox/materialiconssharp/black/res/drawable/sharp_inbox_24.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24"
    android:tint="?attr/colorControlNormal">
  <path
      android:fillColor="@android:color/white"
      android:pathData="M21,3L3.01,3v18L21,21L21,3zM19,15h-4c0,1.66 -1.35,3 -3,3s-3,-1.34 -3,-3L5,15L5,5h14v10z"/>
</vector>