RFR: 8306466: Open source more AWT Drag & Drop related tests [v2]

[Damon Nguyen]

On Thu, 27 Apr 2023 07:19:01 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> meaning you are suggesting they need to be volatile ?
>
> or changed to be used on the same thread, in this case EDT. It seems different tests use different approaches.

I made this var volatile and put the frame blocks in the EDT. Should all be fixed

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PR Review Comment: https://git.openjdk.org/jdk/pull/13653#discussion_r1180495245