cancel solving file conflict in nextcloud android app crashes nextcloud App

### ⚠️ Before posting ⚠️

- [x] This is a **bug**, not a question or an enhancement.
- [x] I've [searched for similar issues](https://github.com/nextcloud/android/issues) and didn't find a duplicate.
- [x] I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
- [x] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/).

### Steps to reproduce

select different heic image files in nextcloud app some are new some already exist
upload those files
android app display a file conflict
offering in a window to select server file or local file
do not choose any file and cancel the action
Android app crashes

background for canceling: the automatic file upload did not upload all images. there I selected all images of this day to be uploaded.
In the preview window where the option was shown which version to keep and which to overwrite the two images looked slightly different.
I wanted to look at both images separately before overwriting one of them

### Expected behaviour

leaving the file conflict open to be solved later
In this case the two small looked different - probably different part of the image in preview?
preview for both images should use the same cutout

### Actual behaviour

The android app crashes. Crash report created from the crash report page that appeared automatically.

### Android version

13

### Device brand and model

Samsung S20FE

### Stock or custom OS?

Stock

### Nextcloud android app version

3.32.0

### Nextcloud server version

30.0.13

### Using a reverse proxy?

Yes

### Android logs

should be added by this function

### Server error logs

```bash

```

### Additional information

_No response_