BLE: Accept pairing request when the user authorization is not required.

Author: pan-

features/FEATURE_BLE/source/generic/GenericSecurityManager.cpp

@@ -863,6 +863,8 @@ void GenericSecurityManager::on_pairing_request(
 
     if (_pairing_authorisation_required) {
         eventHandler->pairingRequest(connection);
+    } else {
+        acceptPairingRequest(connection);
     }
 }