[jdk21u-dev] RFR: 8319938: TestFileChooserSingleDirectorySelection.java fails with "getSelectedFiles returned empty array"

[Goetz Lindenmaier]

I backport this for parity with 21.0.3-oracle.

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Commit messages:
 - Backport 4ef24e2596340c5375f2ab07883c26a6458efe0e

Changes: https://git.openjdk.org/jdk21u-dev/pull/116/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=116&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319938
  Stats: 148 lines in 1 file changed: 58 ins; 53 del; 37 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/116.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/116/head:pull/116

PR: https://git.openjdk.org/jdk21u-dev/pull/116