RFR: 8339943: Frame not disposed in java/awt/dnd/DropActionChangeTest.java [v3]

[Manukumar V S]

> Stabilized the test by disposing the frame at the end, adding an auto delay,  called panel.getLocationOnScreen() in invokeAndWait(), formatting changes, etc
> And for better debugging, added captureScreen() for failure cases.
> 
> Testing:
> Tested using mach5 in all available platforms and attached the link in bug as a comment.

Manukumar V S has updated the pull request incrementally with one additional commit since the last revision:

  Review comments fixed : Minor formatting changes

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20951/files
  - new: https://git.openjdk.org/jdk/pull/20951/files/6238ba9b..b4758cd7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20951&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20951&range=01-02

  Stats: 24 lines in 1 file changed: 10 ins; 7 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/20951.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20951/head:pull/20951

PR: https://git.openjdk.org/jdk/pull/20951