Is your feature request related to a problem?

Currently, it's custom:

This prevents it accessing https://developer.android.com/training/data-storage/shared/documents-files, whereas utilizing the native FP would.

Describe the solution you'd like

Utilize the native file picker (com.android.documentsui):

Describe alternatives you've considered

Unfortunately, the ability to access such virtual directories cannot be implemented by 3rd-party applications, if zhanghai/MaterialFiles#1215 (comment) applies to all virtual folders (rather than merely system-provided, sensitive ones, like Bug Reports).

Additional context