RFR: 8340985: Open source some Desktop related tests [v2]

[Alexander Zuev]

> Clean up and open source five regression tests related to java.awt.Desktop component.

Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:

  Apply suggestions from code review
  
  Co-authored-by: Abhishek Kumar <abhishek.cx.kumar at oracle.com>

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/21321/files
  - new: https://git.openjdk.org/jdk/pull/21321/files/2f546998..b609c733

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21321&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21321&range=00-01

  Stats: 4 lines in 3 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/21321.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21321/head:pull/21321

PR: https://git.openjdk.org/jdk/pull/21321