[iOS AzureCommunicationCalling 1.0.1] The callClient.createCallAgent block main thread if the network is poor or not connected

[AmyL219]

Describe the bug
Call the function blow when there is no Internet connection, there wouldn't have any call back and block the whole main thread if I make the call inside DispatchQueue.main.async

callClient?.createCallAgent(userCredential: tokenCredential, options: options) { [weak self] (agent, error) in
}

To Reproduce
Steps to reproduce the behavior:

1. Close the internet connection in your device
2. Try to create connection with callClient?.createCallAgent
3. There wouldn't have any callback to indicate the connection is failed

Expected behavior
There should have a callBack with an error indicate the connection failed.

Screenshots
If applicable, add screenshots to help explain your problem.

Log file:
No Internet State.xcappdata.zip

[AmyL219]

https://skype.visualstudio.com/SPOOL/_sprints/taskboard/ACS%20Mobile%20UI/SPOOL/CY2021-Q3/Sprint%2045%20(Ends%20September%2019)?workitem=2569670

[AmyL219]

Log file:
No Internet State.xcappdata.zip

[jimchou-dev]

Issue still persist 2.1.0-beta.1