Unit Testing with Java SDK #1462

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Is your feature request related to a problem? Please describe.
I have been trying to figure out a way to write unit tests for my bot's dialogs made with the Java SDK, but haven't had much luck. I have been going through the documentation https://docs.microsoft.com/en-us/azure/bot-service/unit-test-bots?view=azure-bot-service-4.0&tabs=javascript. and the sample bots: https://github.com/microsoft/BotBuilder-Samples. I haven't been able to find any examples of unit testing the bot SDK in Java.

Describe the solution you'd like
Ideally I would like to have a DialogTestClient() and similar to the ones that exist in Javascript and C#: https://docs.microsoft.com/en-us/azure/bot-service/unit-test-bots?view=azure-bot-service-4.0&tabs=javascript. Something that would allow me to write tests for dialogs in isolation outside of a bot and without having to deploy your code to a web service.

Describe alternatives you've considered
I have looked into potentially developing a spinning up an instance of the bot and writing tests against the api responses we get from it, which feels separate from unit testing.

Additional context