RFR: 8336031: Create implementation of NSAccessibilityStaticText protocol [v3]

[Alexander Zuev]

> Initial implementation of the protocol.

Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:

  Removing methods that supposed to generate attributed strings. String attributes are not available for the static text elements and cause exceptions to be thrown when requested.

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1507/files
  - new: https://git.openjdk.org/jfx/pull/1507/files/ce4cc10b..aeedf36f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1507&range=02
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1507&range=01-02

  Stats: 19 lines in 2 files changed: 0 ins; 19 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1507.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1507/head:pull/1507

PR: https://git.openjdk.org/jfx/pull/1507