RFR: 8298645 JNI works with accessibleSelection on a wrong thread [v3]

[Artem Semenov]

> [ComboBoxAccessibility accessibilityValue] works with the accessibleSelection object directly, however the work should go through CAccessibility so that it is executed on the Event Dispatch thread.

Artem Semenov has updated the pull request incrementally with one additional commit since the last revision:

  update copyrites

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/11653/files
  - new: https://git.openjdk.org/jdk/pull/11653/files/38319bf7..02f9b760

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11653&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11653&range=01-02

  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/11653.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11653/head:pull/11653

PR: https://git.openjdk.org/jdk/pull/11653