RFR: 8298644 JNI call of getCurrentComponent on a wrong thread [v4]

[Artem Semenov]

> [OutlineRowAccessibility currentAccessibleWithENV:] defines the getCurrentComponent method on the AccessibleContext instance of AccessibleJTreeNode class, however the call should go through CAccessibility so that it is executed on the Event Dispatch thread.

Artem Semenov has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains four commits:

 - Merge master
 - update accessor
 - Please split the long lines to have 80 chars per line.
 - 8298644 JNI call of getCurrentComponent on a wrong thread

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Changes: https://git.openjdk.org/jdk/pull/11670/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11670&range=03
  Stats: 85 lines in 4 files changed: 63 ins; 15 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/11670.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11670/head:pull/11670

PR: https://git.openjdk.org/jdk/pull/11670