Cert: Do not call OnRemoteNameResponse when receiving HCI status pending

* OnRemoteNameResponse should only be invoked when the remote name
  request is successuful or failed
* It should not be called when the request is pending

Bug: 307877650
Test: m bluetooth_stack_with_facade && gd/cert/run --clean SecurityTest
Change-Id: I8bf1ee69a48e23e66ec30a8163ad3b873c6755e4