Upload shows 100% immediately

### ⚠️ 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

1. Go into the Nextcloud APP in Android
2. Choose the files to download
3. Click for download

For example, the error does not occur when I load version 33.0.1 (downloaded from GitHub) as an APK onto my phone.

### Expected behaviour

As before, you should be able to see the download progress bar.

### Actual behaviour

When I download a large file, my phone immediately shows 100%. The progress bar is already at the end. Nevertheless, the file continues to download in the background. There must be a display error. This behavior occurs on three Samsung phones in my family with this version.

### Android version

16

### Device brand and model

Samsung Galaxy S25FE

### Stock or custom OS?

Stock

### Nextcloud android app version

34.0.1

### Nextcloud server version

34.0.1

### Using a reverse proxy?

I don't know

### Android logs

_No response_

### Server error logs

```bash

```

### Additional information

_No response_

Start by reproducing a large-file download on Android 16 with Nextcloud Android 34.0.1, then compare the progress display with version 33.0.1, as described in the report. Trace the download progress handling from the Android app entry point; done means the progress bar reflects actual download progress instead of reaching 100% immediately.

Written by the indexing model from the issue text.