Using threads for ros service callback

[theksg]

This is with ref to:

ROS-TCP-Connector/com.unity.robotics.ros-tcp-connector/Runtime/TcpConnector/RosTopicState.cs

Lines 124 to 131 in c27f00c

	if (m_ServiceImplementationAsync != null)
	{
	response = await m_ServiceImplementationAsync(requestMessage);
	}
	else
	{
	response = m_ServiceImplementation(requestMessage);
	}

While creating a script for ROS 2 services in Unity, i realized that Unity uses same thread for ROS 2 service callback and for the Update function. But I wish to run service callbacks on a different thread and Update on main thread.

I am able to manually do it by changing RosState file and it is working fine.

I would like to know if it is fine to do it this way or not. If there are any issues related to threads for ROS 2 service callbacks, what they can be.

Also, are you considering updating the code for the same?