In EditActivity, the "save button" does not save the picture in the gallery app

Created by: Sanimys

• I checked the release notes for known issues
• I checked the existing issues
• I checked that the issue is not related to my instance configuration, and that my instance has the latest version of pixelfed

When we save an image, we would like to be able to access it from the gallery app, which is not the case so far.