RFR: 8331870: open java/awt/dnd/MouseEventAfterStartDragTest/MouseEventAfterStartDragTest.java

[Alisen Chung]

Opening closed dnd test
Test is green on all platforms

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Commit messages:
 - init commit

Changes: https://git.openjdk.org/jdk/pull/19128/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19128&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331870
  Stats: 204 lines in 1 file changed: 204 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/19128.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19128/head:pull/19128

PR: https://git.openjdk.org/jdk/pull/19128