Unintended toolbar type when going to rich preview of root directory.

### ⚠️ 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

- Open the Nextcloud application.
- Then go to rich preview (that shows if a directory has a `Readme.md` file).
- You can see that the toolbar does not change, it is same as it was showing in the main view.

### Demo -->

https://github.com/nextcloud/android/assets/111801812/3ace4287-954a-4292-aa81-4180d5c7ee73

- Opening the rich preview from root does not change the toolbar
- After opening rich preview of photos directory does have the change.

### Expected behaviour

For the root directory the toolbar does not change as it does when going to other directories or previews.

### Actual behaviour

The toolbar remains as same as it was in the main view when opening rich preview from the root directory.

### Android version

13

### Device brand and model

Oneplus 9RT

### Stock or custom OS?

Stock

### Nextcloud android app version

-

### Nextcloud server version

-

### Using a reverse proxy?

I don't know

### Android logs

_No response_

### Server error logs

_No response_

### Additional information

_No response_