RFR: 8333403: Write a test to check various components events are triggered properly [v6]

[Ravi Gupta]

> This testcase checks for the following assertions for Component events:
> 
> 1. When components are resized, moved, hidden and shown the respective events are triggered.
> 2. When the components are hidden/disabled also,the component events like resized/moved are triggered.
> 3. When a hidden component is hidden again, or a visible component is shown again, the events should not be fired.
> 4. When a window is minimized/restored then hidden and shown component events should be triggered.
> 
> Testing:
> Tested using Mach5(20 times per platform) in macos,linux and windows and got all pass.

Ravi Gupta has updated the pull request incrementally with one additional commit since the last revision:

  8333403: Review commnets fixed

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19521/files
  - new: https://git.openjdk.org/jdk/pull/19521/files/6fc17f93..eb2a4741

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19521&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19521&range=04-05

  Stats: 146 lines in 1 file changed: 22 ins; 92 del; 32 mod
  Patch: https://git.openjdk.org/jdk/pull/19521.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19521/head:pull/19521

PR: https://git.openjdk.org/jdk/pull/19521