RFR: 8281284 : Write JSlider accessibility test [v3]

[lawrence.andrews]

> This testcase covers both old and new api ( api added in jdk17  getAccessibleAction(), getAccessibleActionCount() , getAccessibleActionDescription )
> 
> @shurymury 
> @savoptik

lawrence.andrews has updated the pull request incrementally with one additional commit since the last revision:

  Add JSlider accessibility test

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7355/files
  - new: https://git.openjdk.java.net/jdk/pull/7355/files/0e1f269f..cc0f6e41

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7355&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7355&range=01-02

  Stats: 344 lines in 2 files changed: 96 ins; 248 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7355.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7355/head:pull/7355

PR: https://git.openjdk.java.net/jdk/pull/7355