This PR open sources a few more AWT DnD related tests -------------
Commit messages: - Add dnd tests Changes: https://git.openjdk.org/jdk/pull/13653/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13653&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8306466 Stats: 838 lines in 8 files changed: 838 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/13653.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13653/head:pull/13653 PR: https://git.openjdk.org/jdk/pull/13653
