Merge "HCI: Check the status of the close() call" into tm-dev

    if (!death_unlink.isOk()) {

      LOG_ERROR("Error unlinking death recipient from the Bluetooth HAL");

    }

    bt_hci_->close();

    auto close_status = bt_hci_->close();

    if (!close_status.isOk()) {

      LOG_ERROR("Error calling close on the Bluetooth HAL");

    }

    callbacks_->ResetCallback();

    bt_hci_ = nullptr;

    bt_hci_1_1_ = nullptr;