RFR: 8305915: java/awt/Frame/FrameLocation/FrameLocation.java fails with "The frame location is wrong!"

[Tejesh R]

The test passed on CI machines with multiple test runs. Few stabilization fix has been made to make the test more robust.

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Commit messages:
 - Stabilization fix

Changes: https://git.openjdk.org/jdk/pull/27366/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27366&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305915
  Stats: 32 lines in 1 file changed: 13 ins; 1 del; 18 mod
  Patch: https://git.openjdk.org/jdk/pull/27366.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27366/head:pull/27366

PR: https://git.openjdk.org/jdk/pull/27366