Support Android File Chooser (to be able to add rclone remote)

[anaxonda]

Checklist

• [X] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [X] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [X] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [X] This issue contains only one feature request.
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Feature description

The rclone management app roundsync supports exposing rclone remotes to other apps, as a local provider. For example, in my file manager Material Files I can add a Backblaze (or nearly any other cloud storage) hosted folder, and manage files and directories as I would with local files.

However, if the Gallery app uses its own directory chooser when choosing which folders to show as albums. In that interface, only folders on the SD card are shown, so I cannot choose my rclone directory.

Why do you want this feature?

This would enable viewing remote, cloud hosted photo albums. I'm looking for a solution to replace google photos, to be able to access my photo library (there are other nice solutions, eg Immich and Photoprism however they require servers.)

Additional information

One not practical nor easy implementation of this is to run rclone mount on a rooted phone.

I'm not sure if enabling using just the stock "file-picker" would be enough to enable showing these directories, but if so it should be pretty easy to enable.

[Philippe-Choquette]

It would also be useful to have this option when you want to move a photo to another folder (Move to > Other folder) in order to save into mounted cloud paths like Google Drive or else.