[jdk11u-dev] RFR: 8262981: Create implementation for NSAccessibilitySlider protocol

[Autumn Capasso]

Backport for [JDK-8262981](https://bugs.openjdk.org/browse/JDK-8262981) (https://bugs.openjdk.org/browse/JDK-8262981) this backport is related to backport [JDK-8265278](https://bugs.openjdk.org/browse/JDK-8265278) or builds will fail. These backports are a part of a larger series of 28 plus backports [JDK-8152350](https://bugs.openjdk.org/browse/JDK-8152350).

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Commit messages:
 - 8262981: Create implementation for NSAccessibilitySlider protocol
 - 8256111: Create implementation for NSAccessibilityStaticText protocol
 - 8256126: Create implementation for NSAccessibilityImage protocol peer
 - 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/1561/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1561&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8262981
  Stats: 1256 lines in 22 files changed: 1201 ins; 51 del; 4 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1561.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1561/head:pull/1561

PR: https://git.openjdk.org/jdk11u-dev/pull/1561