Support for SAF Custom Document Provider

[tomekit]

I am wondering if there are any plans to support custom document provider: https://developer.android.com/guide/topics/providers/create-document-provider

This would allow implementing a sort of virtual mount/drive for a Flutter app which in turns e.g. connect to cloud, network or any remote file system.

There would have to be a way to implement at least those 4 methods: https://developer.android.com/guide/topics/providers/create-document-provider#subclass
queryRoots()
queryChildDocuments()
queryDocument()
openDocument()

[jvoltci]

Interesting. We would love to add that into here. Please feel free to raise request .