Vault exported from the Android app does not contain passkeys

### Steps To Reproduce

1. Create a brand new account.
2. Create an item with a passkey (as already reported here on GitHub, for some websites it's not possible to create passkeys from the Android app, requiring thus the credential to be created the Firefox browser extension).
3. Export an encrypted .json from android app.
4. Purge the vault.
5. Restore the export taken on step 3 (using android app, web vault or browser extension)
6. Check if the passkey is present in the restored item.

### Expected Result

The passkey was successfully imported into the vault item

### Actual Result

The passkey is missing from the item restored.

### Screenshots or Videos

_No response_

### Additional Context

If the vault is exported from the web app or the browser extension, this issue does not occur.

### Build Version

Android app 2025.6.1 (20398)

### What server are you connecting to?

US

### Self-host Server Version

_No response_

### Environment Details

- Samsung Galaxy S25 Plus
- Android 15, One UI 7.0

### Issue Tracking Info

- [x] I understand that work is tracked outside of Github. A PR will be linked to this issue should one be opened to address it, but Bitwarden doesn't use fields like "assigned", "milestone", or "project" to track progress.