RFR: 8331896: JFR: Improve check for JDK classes

[Markus Grönlund]

On Tue, 4 Jun 2024 14:27:29 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

> Could I have a review of change that prepares for support for JDK events in other modules besides java.base.
> 
> Testing: jdk/jdk/jfr
> 
> Thanks
> Erik

Marked as reviewed by mgronlun (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/19542#pullrequestreview-2097460231