RFR: 8307079: Update test java/awt/Choice/DragOffNoSelect.java

[Phil Race]

Small update to a test

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Commit messages:
 - 8307079

Changes: https://git.openjdk.org/jdk/pull/13705/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13705&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307079
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13705.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13705/head:pull/13705

PR: https://git.openjdk.org/jdk/pull/13705