This PR open sources more AWT DnD & Event related tests -------------
Commit messages: - Initial test add Changes: https://git.openjdk.org/jdk/pull/13725/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13725&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8306871 Stats: 1916 lines in 6 files changed: 1916 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/13725.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13725/head:pull/13725 PR: https://git.openjdk.org/jdk/pull/13725
