Cryptomator does NOT work with Secure Folder on Android 16

### Please agree to the following

- [x] I have searched [existing issues](https://github.com/cryptomator/android/issues?q=) for duplicates
- [x] I agree to follow this project's [Code of Conduct](https://github.com/cryptomator/android/blob/develop/.github/CODE_OF_CONDUCT.md)

### Summary

When you go to upload files from Secure Folder (meaning the Cryptomator app is installed within it), it shows you the files on your BASE Android device and not your Secure Folder files...

### System Setup

```markdown
- Android: 16 [Version shown in the settings of Android"]
- Cryptomator: 1.12.2 [Version shown in the settings of Cryptomator]
- …
```

### Cloud Type

Google Drive

### Steps to Reproduce

1. Open vault
2. Press upload file
3. (That's it... You're presented with the default Android filesystem)

### Expected Behavior

Shows the Secure Folder filesystem. To be clear, this is supposed to be a separate, hidden version that mirrors the hierarchy of the normal Android filesystem (Download, Documents, etc).

### Actual Behavior

Default Android filesystem is used (feel like I was asked this 10 times lol)

### Reproducibility

Always

### Relevant Log Output

```shell

```

### Anything else?

This issue is also NOT unique to Cryptomator https://github.com/avluis/Hentoid/issues/1311 And https://us.community.samsung.com/t5/Samsung-Apps-and-Services/Secure-folder-applications-within-cannot-access-files-with-One/td-p/3364467. However, it does affect Cryptomator and make it basically unusable for me (as I store a lot of files using Secure Folder).