[jdk11u-dev] RFR: 8264290: Create implementation for NSAccessibilityComponentGroup protocol peer [v2]

[Autumn Capasso]

> This Backport is clean [JDK-8264290](https://bugs.openjdk.org/browse/JDK-8264290). Tested and built locally. Part of 28 part Accessibility series [JDK-8152350](https://bugs.openjdk.org/browse/JDK-8152350).

Autumn Capasso 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:

 - Merge branch 'master' into JDK-8264290
 - Backport 9d669c912d3977027f321a5e6b7f045ca2ce9482)
 - Backport 6c107fdff289cc553df12ee10b0c8002b84059b2
 - Backport 9d669c912d3977027f321a5e6b7f045ca2ce9482)

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/1705/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/1705/files/36cf7d27..6eb8001d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1705&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1705&range=00-01

  Stats: 2525 lines in 105 files changed: 1423 ins; 692 del; 410 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1705.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1705/head:pull/1705

PR: https://git.openjdk.org/jdk11u-dev/pull/1705