RFR: 8298645 JNI works with accessibleSelection on a wrong thread [v2]

[Sergey Bylokhov]

On Wed, 14 Dec 2022 09:26:09 GMT, Artem Semenov <asemenov at openjdk.org> wrote:

>> [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:
> 
>   A comment or javadoc should mention that this is called from native code, specifically pointing to ComboBoxAccessibility.m.

Marked as reviewed by serb (Reviewer).

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