Class description JavaDoc for DefaultStreamCallbacks

[sirknightj]

Issue #, if available:

• N/A

What was changed?

• Javadoc documentation enhancement for the DefaulStreamCallbacks and Streaming package

Why was it changed?

• Making it easier for new users to onboard

How was it changed?

• Add JavaDoc for DefaultStreamCallbacks
• Add Package info for the Streaming package

What testing was done for the changes?

• Locally compiled the Javadoc for the changes. Pasted the code sample to make sure it is syntactically correct.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.23%. Comparing base (8b00331) to head (eed8106).
⚠️ Report is 15 commits behind head on develop.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop     #255      +/-   ##
=============================================
+ Coverage      49.27%   50.23%   +0.96%     
- Complexity       568      590      +22     
=============================================
  Files            106      106              
  Lines           4134     4176      +42     
  Branches         263      271       +8     
=============================================
+ Hits            2037     2098      +61     
+ Misses          1949     1929      -20     
- Partials         148      149       +1     

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