RFR: 8365815: JFR: Update metadata.xml with 'jfr query' examples [v3]

[Markus Grönlund]

On Fri, 22 Aug 2025 06:09:30 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

>> Could I have a review of a PR that adds a couple of 'jfr query' examples to metadata.xml?
>> 
>> It turns out that the EventDuration event doesn't work because it has no fields. The fix is to remove the class-specific commit() method and constructor for events without fields.
>> 
>> Testing: test/jdk/jdk/jfr + tier1
>> 
>> Thanks
>> Erik
>
> Erik Gahlin has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add s

Marked as reviewed by mgronlun (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/26869#pullrequestreview-3151361907