RFR: 8298643 JNI call of getAccessibleRowWithIndex and getAccessibleColumnWithIndex on a wrong thread

[Artem Semenov]

[TableAccessibility accessibleRowWithIndex] and [TableAccessibility accessibleColumnWithIndex] defines the getAccessibleRowWithIndex and getAccessibleColumnWithIndex methods on the AccessibleContext instance of AccessibleJTable class, however the call should go through CAccessibility so that it is executed on the Event Dispatch thread.

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Commit messages:
 - 8298643 JNI call of getAccessibleRowWithIndex and getAccessibleColumnWithIndex on a wrong thread 

Changes: https://git.openjdk.org/jdk/pull/11649/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11649&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298643
  Stats: 18 lines in 1 file changed: 0 ins; 8 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/11649.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11649/head:pull/11649

PR: https://git.openjdk.org/jdk/pull/11649