RFR: 8312075: FileChooser.win32.newFolder is not updated when changing Locale [v4]

[Tejesh R]

> On `NewFolderAction`, plain String is added `Action.ACTION_COMMAND_KEY`. Converting the `String `to `locale` before adding as command key fix the issue. 
> I have verified the test in all other platforms and Look and Feel which has option to create New Folder, results were fine. No regressions found on CI system with the fix. Added manual test to verify the fix.

Tejesh R has updated the pull request incrementally with one additional commit since the last revision:

  Test update

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15069/files
  - new: https://git.openjdk.org/jdk/pull/15069/files/3d246c3b..4b825b86

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15069&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15069&range=02-03

  Stats: 114 lines in 1 file changed: 48 ins; 48 del; 18 mod
  Patch: https://git.openjdk.org/jdk/pull/15069.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15069/head:pull/15069

PR: https://git.openjdk.org/jdk/pull/15069