RFR: 8344337: SecurityManager cleanup in java.prefs moduleRemove SecMgr, etc usage from java.prefs

[Sean Mullan]

On Tue, 19 Nov 2024 18:52:59 GMT, Brent Christian <bchristi at openjdk.org> wrote:

> Remove usages of SecurityManager, doPrivildged, and AccessController from the java.prefs module.

A few classes need updated copyrights.

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PR Comment: https://git.openjdk.org/jdk/pull/22252#issuecomment-2486583493