[jdk17u-dev] RFR: 8341278: Open source few TrayIcon tests - Set7

[Goetz Lindenmaier]

I backport this for parity with 17.0.16-oracle.

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Commit messages:
 - Backport 4d50cbb5a73ad1f84ecd6a895045ecfdb0835adc

Changes: https://git.openjdk.org/jdk17u-dev/pull/3497/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3497&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341278
  Stats: 493 lines in 5 files changed: 493 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3497.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3497/head:pull/3497

PR: https://git.openjdk.org/jdk17u-dev/pull/3497