add dragging file to filesystem feature to chromebooks

[eggosarethebest]

I recently got into game development and only have a chromebook without linux so I heard about godot on the playstore so I downloaded it and tried to follow tutorials but when I tried to drag a file into godot and it didn't work

Screen.recording.2023-02-15.9.24.50.PM.webm

[Calinou]

This is already being tracked in #6168.