[jfx17u] RFR: 8301312: Create implementation of NSAccessibilityButton protocol

[Johan Vos]

8301312: Create implementation of NSAccessibilityButton protocol

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Commit messages:
 - Backport 05548ace27f099a5ce152e3fb9efb4d22da683c8

Changes: https://git.openjdk.org/jfx17u/pull/193/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx17u&pr=193&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301312
  Stats: 421 lines in 7 files changed: 372 ins; 41 del; 8 mod
  Patch: https://git.openjdk.org/jfx17u/pull/193.diff
  Fetch: git fetch https://git.openjdk.org/jfx17u.git pull/193/head:pull/193

PR: https://git.openjdk.org/jfx17u/pull/193