Always return credProtect in credential management

Fixes P-1 in this test:
https://github.com/fido-alliance/ctap2.1-conformance-module/blob/main/tests/CTAP2/Protocol/CredentialManagement/21/CredentialManagement-21-EnumerateCredentials.js

libraries/opensk/src/ctap/credential_management.rs

@@ -91,12 +91,13 @@ fn enumerate_credentials_response<E: Env>(
         transports: None, // You can set USB as a hint here.
     };
     let public_key = private_key.get_pub_key::<E>()?;
+    let cred_protect = cred_protect_policy.or(Some(env.customization().default_cred_protect()));
     Ok(AuthenticatorCredentialManagementResponse {
         user: Some(user),
         credential_id: Some(credential_id),
         public_key: Some(public_key),
         total_credentials,
-        cred_protect: cred_protect_policy,
+        cred_protect,
         large_blob_key,
         ..Default::default()
     })