RFR: 8340621: Open source several AWT List tests

[Prasanta Sadhukhan]

Opensource few AWT List tests

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Commit messages:
 - 8340621: Open source several AWT List tests

Changes: https://git.openjdk.org/jdk/pull/21202/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21202&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340621
  Stats: 500 lines in 5 files changed: 500 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21202.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21202/head:pull/21202

PR: https://git.openjdk.org/jdk/pull/21202