RFR: 8324220: jdk/jfr/event/io/TestSerializationMisdeclarationEvent.java had 22 failures

[Raffaello Giulietti]

Patch to fix failures after [8275338](https://bugs.openjdk.org/browse/JDK-8275338).

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Commit messages:
 - 8324220: jdk/jfr/event/io/TestSerializationMisdeclarationEvent.java had 22 failures

Changes: https://git.openjdk.org/jdk/pull/17549/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17549&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324220
  Stats: 13 lines in 1 file changed: 3 ins; 2 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/17549.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17549/head:pull/17549

PR: https://git.openjdk.org/jdk/pull/17549