Merge "Initialize device type"

  uint8_t flag_len;

  const uint8_t* p_flag = AdvertiseDataParser::GetFieldByType(

      advertising_data, BTM_BLE_AD_TYPE_FLAG, &flag_len);

  bluetooth::hci::DeviceType device_type;

  auto device_type = bluetooth::hci::DeviceType::UNKNOWN;

  bool is_adv_connectable = event_type & (1 << BLE_EVT_CONNECTABLE_BIT);

  // 1. If adv is connectable and flag data is not present, device type is

  // DUAL mode.