[jdk11u-dev] RFR: 8261350: Create implementation for NSAccessibilityCheckBox protocol peer

[Autumn Capasso]

[JDK-8261350](https://bugs.openjdk.org/browse/JDK-8261350)  Mostly clean each backport seems to just be cleaning up the java.desktop/macosx/native/libawt_lwawt/awt/a11y/RadiobuttonAccessibility.m file so it aligns properly.

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Commit messages:
 - 8261350: Create implementation for NSAccessibilityCheckBox protocol peer
 - 8261351: Create implementation for NSAccessibilityRadioButton protocol
 - JDK-8261352 create implementation for component peer for all the components who should be ignored in a11y interactions
 - 8256110: Create implementation for NSAccessibilityStepper protocol

Changes: https://git.openjdk.org/jdk11u-dev/pull/1550/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1550&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8261350
  Stats: 726 lines in 13 files changed: 672 ins; 51 del; 3 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1550.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1550/head:pull/1550

PR: https://git.openjdk.org/jdk11u-dev/pull/1550