Java: Implement API changes necessary for 06-Assistants V1 sample to execute as expected

[d3r3kk]

Implement the necessary changes in the Semantic Kernel for Java API to allow the 06-Assistants sample to run as expected.

This is preliminary implementation and can be either a "hack" placed in the SK V1 Proposal repo itself or can be part of our work on the Semantic Kernel for Java - V1 branch, whichever makes the most sense.

Our intention is to get all of the samples (01..06) working, then reassess the state of the Semantic Kernel for Java API to build out a production-worthy v1.

[github-actions]

This issue is stale because it has been open for 90 days with no activity.