Unified search reault items icons get colored for too many cases

### ⚠️ 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

Found while testing #16417 @alperozturk96

1. trigger a unified search that has different types of results, see screenshot

### Expected behaviour

properly colored icons

### Actual behaviour

### Android version

16

### Device brand and model

OP13

### Stock or custom OS?

Stock

### Nextcloud android app version

master

### Nextcloud server version

33.0.0RC2

### Using a reverse proxy?

I don't know

### Android logs

_No response_

### Server error logs

```bash

```

### Additional information

_No response_