8256108: Create implementation for NSAccessibilityElement protocol peer

[WithEnoughCoffee]

JDK-8256108 Clean part of 28.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8256108: Create implementation for NSAccessibilityElement protocol peer

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk11u-dev pull/1571/head:pull/1571
$ git checkout pull/1571

Update a local copy of the PR:
$ git checkout pull/1571
$ git pull https://git.openjdk.org/jdk11u-dev pull/1571/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1571

View PR using the GUI difftool:
$ git pr show -t 1571

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk11u-dev/pull/1571.diff

[bridgekeeper]

👋 Welcome back Autumn808! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 00: Full (8f7ff2d2)