<AWT Dev> RFR: 8267066: New NSAccessibility peers should return they roles and subroles directly [v2]

[Alexander Zuev]

> Made all implementing classes return their roles directly.
> Change nullability attributes to the singular style across new classes.

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

  Fixed old style nullability attributes in StaticTextAccessibility.h

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4162/files
  - new: https://git.openjdk.java.net/jdk/pull/4162/files/c6a0cbc0..3cd06156

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4162&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4162&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4162.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4162/head:pull/4162

PR: https://git.openjdk.java.net/jdk/pull/4162