RFR: 8341447: Open source closed frame tests # 5 [v2]

[Alexander Zvegintsev]

> More tests to open source:
> 
> - java/awt/Frame/FocusTest.java - in the [problem list](https://bugs.openjdk.org/browse/JDK-8341480) on macos
> - java/awt/Frame/InitialIconifiedTest.java - added undecorated case, and improved failure detection for macos
> 
> Testing looks good.

Alexander Zvegintsev has updated the pull request incrementally with one additional commit since the last revision:

  review comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21372/files
  - new: https://git.openjdk.org/jdk/pull/21372/files/a8501024..32aa7ff6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21372&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21372&range=00-01

  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/21372.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21372/head:pull/21372

PR: https://git.openjdk.org/jdk/pull/21372