RFR: 8344077: Remove security manager dependency in java.io

[Brian Burkhalter]

On Mon, 18 Nov 2024 20:28:49 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> Expunge the use of the `SecurityManager`, `AccessController`, and the like from the `java.io` package.

Preliminary testing: the `jdk_io` tests pass on Linux and Windows.

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PR Comment: https://git.openjdk.org/jdk/pull/22219#issuecomment-2484074311