fix:tcp connection window size split from stream connection window size for 3.3

[JunJieLiu51520]

What is the purpose of the change

see issue #14635

Brief changelog

Verifying this change

Checklist

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[JunJieLiu51520]

@oxsean PTAL

[oxsean]

Connection initial window size.
Keeping one style.

[oxsean]

Please format your code with spotless:apply first

[JunJieLiu51520]

Please format your code with spotless:apply first

ok, got it