Keystore 2.0: Fix permission check for device attestation.

A permission check was missing guarding device unique attestation.

Test: N/A
Change-Id: I4c870f50fafacc8b1731c3fed6a846c72b035646
diff --git a/keystore2/src/security_level.rs b/keystore2/src/security_level.rs
index 20f7226..50d697e 100644
--- a/keystore2/src/security_level.rs
+++ b/keystore2/src/security_level.rs
@@ -372,7 +372,7 @@
         if params.iter().any(|kp| kp.tag == Tag::INCLUDE_UNIQUE_ID) {
             check_key_permission(KeyPerm::gen_unique_id(), key, &None).context(concat!(
                 "In add_certificate_parameters: ",
-                "Caller does not have the permission for device unique attestation."
+                "Caller does not have the permission to generate a unique ID"
             ))?;
         }