[jdk26] RFR: 8372661: Add a null-safe static factory method to "jdk.test.lib.net.SimpleSSLContext"

[Shivangi Gupta]

8372661: Add a null-safe static factory method to "jdk.test.lib.net.SimpleSSLContext"
Straight Backport

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Commit messages:
 - Backport 629e4ac6f45c87898f6a014f28a443c800413869

Changes: https://git.openjdk.org/jdk/pull/29064/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29064&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372661
  Stats: 95 lines in 1 file changed: 51 ins; 5 del; 39 mod
  Patch: https://git.openjdk.org/jdk/pull/29064.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29064/head:pull/29064

PR: https://git.openjdk.org/jdk/pull/29064