RFR: 8345141: Remove uses of SecurityManager in ShellFolder related classes [v3]

[Phil Race]

> Remove SecurityManager related code from Swing filechooser implementation

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8345141

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22423/files
  - new: https://git.openjdk.org/jdk/pull/22423/files/1ee28bd6..8fdcb9c8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22423&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22423&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/22423.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22423/head:pull/22423

PR: https://git.openjdk.org/jdk/pull/22423