Auto upload notification sometimes incorrectly indicates one more image to upload

### Please agree to the following

- [X] I have searched [existing issues](https://github.com/cryptomator/android/issues?q=) for duplicates
- [X] I agree to follow this project's [Code of Conduct](https://github.com/cryptomator/android/blob/develop/.github/CODE_OF_CONDUCT.md)

### Summary

Auto upload notification sometimes incorrectly indicates one more image to upload

### System Setup

```markdown
- Android: x
- Cryptomator: x
- …
```

### Cloud Type

_No response_

### Steps to Reproduce

1. Take three pictures
2. Unlock vault associated with the auto upload feature

### Expected Behavior

Three pictures are uploaded and then a notification with the following text is shown:
```
Auto upload finished
3 images uploaded to vault
```

### Actual Behavior

After uploading the three pictures, the upload is finished but the notification states
`Auto photo upload running Uploading 4/3`

This notification is shown until the user clicks on `Cancel` in the notification or a new auto upload is triggered which replaces this notification.

### Reproducibility

Intermittent

### Relevant Log Output

_No response_

### Anything else?