RFR: 8340228: Open source couple more miscellaneous AWT tests

[Alexander Zuev]

Cleaning up and opensourcing three more tests.

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Commit messages:
 - 8340228: Open source couple more miscellaneous AWT tests

Changes: https://git.openjdk.org/jdk/pull/21097/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21097&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340228
  Stats: 321 lines in 3 files changed: 321 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21097.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21097/head:pull/21097

PR: https://git.openjdk.org/jdk/pull/21097