Description

The backup feature was fixed on Android in this PR.

However, it only works for manual backups, because we need to catch the save path from Go and then use the SAF to move the file to the user's wanted location.

This means that for auto-backups, the file will be stuck in the sandbox.

To fix that, we need to modify the status-go code to send a signal when the auto-backup is done. In that signal, the file path should be passed. Then, on the client side, we need to listen to the signal on Android and move the file to the chosen path, the same way we did in the above PR.