Update message size limit to be 32kb.

[f2prateek]

We've changed the maximum message size from to 32kb — https://github.com/segmentio/api-validator/commit/ba561c3acc27c26ac9a55549964ffd8f17a54d6c. This is also documented at https://segment.com/docs/sources/server/http/#max-request-size.

Ref: https://segment.atlassian.net/browse/LIB-225

[codecov-io]

Codecov Report

Merging #575 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #575   +/-   ##
=======================================
  Coverage   82.94%   82.94%           
=======================================
  Files          30       30           
  Lines        2451     2451           
  Branches      281      281           
=======================================
  Hits         2033     2033           
  Misses        334      334           
  Partials       84       84

Impacted Files	Coverage Δ
...java/com/segment/analytics/SegmentIntegration.java	81.12% <ø> (ø)	⬆️

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