RFR: 8328540: test javax/swing/JSplitPane/4885629/bug4885629.java fails on windows hidpi [v2]

[Phil Race]

> A simple fix to the test to skip sampling the leftmost and rightmost ends of the divider
> to avoid possible issues at fractional scales.

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8328540

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18384/files
  - new: https://git.openjdk.org/jdk/pull/18384/files/9618fa4a..b8c3c48a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18384&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18384&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18384.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18384/head:pull/18384

PR: https://git.openjdk.org/jdk/pull/18384