RFR: 8344994: Remove most uses of RuntimePermission checks in java.desktop

[Phil Race]

More clean up after JEP 486 (SecurityManager disabling).
FilePermission is the most common RuntimePermission checked in java.desktop

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Commit messages:
 - 8344994
 - 8344994

Changes: https://git.openjdk.org/jdk/pull/22373/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22373&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344994
  Stats: 252 lines in 15 files changed: 0 ins; 244 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/22373.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22373/head:pull/22373

PR: https://git.openjdk.org/jdk/pull/22373