RFR: 8339995: Open source several AWT focus tests - series 6

[Prasanta Sadhukhan]

Opensource few Focus tests

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Commit messages:
 - windows
 - InitialFocusTest
 - 8339995: Open source several AWT focus tests - series 6

Changes: https://git.openjdk.org/jdk/pull/21079/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21079&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339995
  Stats: 580 lines in 5 files changed: 580 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21079.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21079/head:pull/21079

PR: https://git.openjdk.org/jdk/pull/21079