RFR: 8317736: Stream::handleReset locks twice

[Conor Cleary]

On Mon, 9 Oct 2023 13:52:39 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

> Trivial one liner fix.
> 
> The fix for [JDK-8308310](https://bugs.openjdk.org/browse/JDK-8308310) introduced a reentrant `stateLock` but also a regression. In Stream::handleReset the lock is locked twice.

LGTM.

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Marked as reviewed by ccleary (Committer).

PR Review: https://git.openjdk.org/jdk/pull/16101#pullrequestreview-1664529328