[jdk24u] RFR: 8344361: Restore null return for invalid services from legacy providers

[Sean Coffey]

Clean backport of the jdk 25 patch

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Commit messages:
 - Backport e20bd018c4046870d0cf632bb8e5440cb9f5c3c2

Changes: https://git.openjdk.org/jdk24u/pull/31/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk24u&pr=31&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344361
  Stats: 50 lines in 2 files changed: 50 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk24u/pull/31.diff
  Fetch: git fetch https://git.openjdk.org/jdk24u.git pull/31/head:pull/31

PR: https://git.openjdk.org/jdk24u/pull/31