RFR: 8345141: Remove uses of SecurityManager in ShellFolder related classes

[Phil Race]

Remove SecurityManager related code from Swing filechooser implementation

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Commit messages:
 - 8345141

Changes: https://git.openjdk.org/jdk/pull/22423/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22423&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345141
  Stats: 138 lines in 5 files changed: 3 ins; 113 del; 22 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