[jdk17u-dev] RFR: 8306683: Open source several clipboard and color AWT tests

[Victor Rudometov]

Clean backport, new tests, low risk
Checked on macOS x64, linux x64, windows x64: tests pass

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Commit messages:
 - Backport 1c2dadc31e8b732d43df5494437720bfbc3f5c8b

Changes: https://git.openjdk.org/jdk17u-dev/pull/1380/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1380&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306683
  Stats: 570 lines in 4 files changed: 570 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1380.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1380/head:pull/1380

PR: https://git.openjdk.org/jdk17u-dev/pull/1380