RFR: 8296934: Write a test to verify whether Undecorated Frame can be iconified or not [v2]

[Anto J]

> This test case verifies that Undecorated Frame can be iconified or not
> Using mouse click events generated WINDOW_ACTIVATED, WINDOW_ICONIFIED, WINDOW_DEACTIVATED, and WINDOW_DEICONIFIED and tested whether it is iconified or not.

Anto J has updated the pull request incrementally with one additional commit since the last revision:

  8296934: Write a test to verify whether Undecorated Frame can be iconified or not

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11812/files
  - new: https://git.openjdk.org/jdk/pull/11812/files/863484b0..cb24853e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11812&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11812&range=00-01

  Stats: 24 lines in 1 file changed: 12 ins; 0 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/11812.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11812/head:pull/11812

PR: https://git.openjdk.org/jdk/pull/11812