Merge "RootCanal: Reject random addresses that are empty"

  // the Controller shall return the error code Command Disallowed (0x0C).

  if (legacy_advertiser_.IsEnabled() || scanner_.IsEnabled() ||

      initiator_.IsEnabled()) {

    LOG_INFO("advertising, scanning or initiating are currently active");

    return ErrorCode::COMMAND_DISALLOWED;

  }

  if (random_address == Address::kEmpty) {

    LOG_INFO("the random address may not be set to 00:00:00:00:00:00");

    return ErrorCode::INVALID_HCI_COMMAND_PARAMETERS;

  }

  LOG_INFO("device random address configured to %s",

           random_address.ToString().c_str());

  random_address_ = random_address;

  return ErrorCode::SUCCESS;

}