google-material-design-icons/android/file/folder/materialicons/black/res/drawable/baseline_folder_18.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="18dp"
    android:height="18dp"
    android:viewportWidth="18"
    android:viewportHeight="18"
    android:tint="?attr/colorControlNormal">
  <path
      android:fillColor="@android:color/white"
      android:pathData="M10,5L8,3H3c-0.55,0 -1,0.45 -1,1v10c0,0.55 0.45,1 1,1h12c0.55,0 1,-0.45 1,-1V6c0,-0.55 -0.45,-1 -1,-1h-5z"/>
</vector>