Macos java dispatch queue

[sbSteveK]

WIP to resolve Java dispatch queue issue

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 75.88%. Comparing base (cf50c47) to head (f31e6a0).

Files with missing lines	Patch %	Lines
source/s2n/s2n_tls_channel_handler.c	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            macos     #763   +/-   ##
=======================================
  Coverage   75.88%   75.88%           
=======================================
  Files          30       30           
  Lines        6399     6399           
=======================================
  Hits         4856     4856           
  Misses       1543     1543           

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