RFR: 8344361: Restore null return for invalid services from legacy providers

[Sean Coffey]

On Mon, 20 Jan 2025 16:06:56 GMT, Sean Coffey <coffeys at openjdk.org> wrote:

> Correct a corner case where null should be returned if a service from the legacyMap is marked invalid. 
> 
> New test case added.

Thanks for the review Valerie

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PR Comment: https://git.openjdk.org/jdk/pull/23201#issuecomment-2612209975