[Crash] Resolve Conflict (when file not found).

### ⚠️ 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

Notification `File upload conflict` for auto-backup folder. Client opens for a few milliseconds, and then crashes. Resolving manually (Open client -> Burger menu -> Uploads -> three-dots on file -> Resolve conflict -> {radio} Local copy -> OK) works. Logcat (ZIP -> manual-resolution.md) seems to indicate specified file does not exist.

### Expected behaviour

Open merge conflict resolver dialog

### Actual behaviour

instant crash. Notification persists.

### Android version

13

### Device brand and model

Samsung Galaxy A12 (SM-a127F); Kitsune Mask (27001)

### Stock or custom OS?

Stock

### Nextcloud android app version

F-Droid\3.35.0 RC2

### Nextcloud server version

32.0.3

### Using a reverse proxy?

I don't know

### Android logs

[Nextcloud Crash Report.zip](https://github.com/user-attachments/files/24231879/Nextcloud.Crash.Report.zip)

### Server error logs

```bash
N/A
```

### Additional information

Provided both logs for the crash from the notification (`Notification-Crash.md`) and the WORKING logs from the manual-resoltion in-app (`Manual-resolution.md`). Logcat provided from Android Studio with filter `package:com.nextcloud.client`.