[jdk11u-dev] RFR: 8264302: Create implementation for Accessibility native peer for Splitpane java role [v3]

[Autumn Capasso]

> This backport is part of the 28 backport Accessibility series JDK-8152350. Tested by building GUI and using the Accessibility components.

Autumn Capasso has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  Backport 45e05970bcee842f98eeeef054f574ccf4b43fad

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Changes: https://git.openjdk.org/jdk11u-dev/pull/1808/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1808&range=02
  Stats: 43 lines in 3 files changed: 39 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1808.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1808/head:pull/1808

PR: https://git.openjdk.org/jdk11u-dev/pull/1808