RFR: 8339791: Refactor MiscUndecorated/ActiveAWTWindowTest.java [v6]

[Srinivas Mandalika]

> The java/awt/Frame/MiscUndecorated/ActiveAWTWindowTest.java test uses object monitors and wait/notify to synchronise actions in the test.
> 
> Using CountDownLatch could make the test simpler, shorter, clearer.
> Tested the code on a windows-x64, macos-x64 and lnux-x64 machines and the test is working as expected.

Srinivas Mandalika has updated the pull request incrementally with two additional commits since the last revision:

 - Review Feedback: Frame focus lost check added back
 - Review Feedback: Fixed Spelling Typo.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/26471/files
  - new: https://git.openjdk.org/jdk/pull/26471/files/91c145f1..a853dca9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26471&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26471&range=04-05

  Stats: 4 lines in 1 file changed: 3 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26471.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26471/head:pull/26471

PR: https://git.openjdk.org/jdk/pull/26471