Remove usages of SecurityManager, doPrivildged, and AccessController from the java.prefs module.
------------- Commit messages: - Remove SecMgr, etc usage from java.prefs Changes: https://git.openjdk.org/jdk/pull/22252/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22252&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8344337 Stats: 243 lines in 6 files changed: 16 ins; 129 del; 98 mod Patch: https://git.openjdk.org/jdk/pull/22252.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/22252/head:pull/22252 PR: https://git.openjdk.org/jdk/pull/22252
