[jdk20u] Integrated: 8208077: File.listRoots performance degradation

[Rob McKenna]

Reviewed-by: lancea, bpb

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Commit messages:
 - 8208077: File.listRoots performance degradation

Changes: https://git.openjdk.org/jdk20u/pull/2/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20u&pr=2&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8208077
  Stats: 29 lines in 2 files changed: 17 ins; 1 del; 11 mod
  Patch: https://git.openjdk.org/jdk20u/pull/2.diff
  Fetch: git fetch https://git.openjdk.org/jdk20u pull/2/head:pull/2

PR: https://git.openjdk.org/jdk20u/pull/2