[Task]: Add success callback to Android Sharesheet

[begonaalvarezd]

Task description

It would be nice if we could have a callback to detect if the file was indeed exported somehow, atm if I close the sharesheet and share nothing, firefly still detects it as a success.

Requirements

success callback implemented

Creation checklist

• [ ] I have assigned this task to the correct people
• [X] I have added the most appropriate labels
• [X] I have linked the correct milestone and/or project