[jdk21u-dev] RFR: 8334297: (so) java/nio/channels/SocketChannel/OpenLeak.java should not depend on SecurityManager

[Andrew Lu]

I backport this for parity with 21.0.5-oracle.

-------------

Commit messages:
 - Backport 50bed6c67b1edd7736bdf79308d135a4e1047ff0

Changes: https://git.openjdk.org/jdk21u-dev/pull/819/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=819&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334297
  Stats: 93 lines in 1 file changed: 82 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/819.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/819/head:pull/819

PR: https://git.openjdk.org/jdk21u-dev/pull/819