RFR: 8271846 a11y API lacks setSelectedIndex method [v3]

[Artem Semenov]

> A11Y implementation on macOS has to directly call the 'JList.setSelectedIndex' method in order to request selection on an item (see 'CAccessibility.requestSelection'). The reason is that a11y API lacks appropriate method.There's only 'javax.accessibility.AccessibleSelection#addAccessibleSelection' which is mapped to 'javax.swing.JList#addSelectionInterval', it can not be used to set selected index.
> 
> @forantar @azuev-java @mrserb please review.
> 
> Please note that the new API allows you to implement a multiple selection in lists from the Java side, but I did not succeed in implementing it, because I could not determine the inclusion of the so-called "VoiceOver multiple selection mode".

Artem Semenov has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - We are trying not to use wildcard imports - probably automatic optimization of the IDE did it? I am always turning it off or set margin so high it is not triggered on anything with less then 200 individual package imports.
 - We don't do @author tags in openjdk
   Not 2022 ?
 - [whitespace fix
 -         8271846 a11y API lacks setSelectedIndex method

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Changes:
  - all: https://git.openjdk.org/jdk/pull/8578/files
  - new: https://git.openjdk.org/jdk/pull/8578/files/4a9bc8e4..ff825131

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=8578&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=8578&range=01-02

  Stats: 907222 lines in 10815 files changed: 520037 ins; 279652 del; 107533 mod
  Patch: https://git.openjdk.org/jdk/pull/8578.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/8578/head:pull/8578

PR: https://git.openjdk.org/jdk/pull/8578