[jdk17u-dev] RFR: 8299994: java/security/Policy/Root/Root.java fails when home directory is read-only

[Goetz Lindenmaier]

I backport this for parity with 17.0.13-oracle.

Omitted ProblemList change, problem listing it was not backported.

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Commit messages:
 - Backport 20579e48cf598e890aa35c5518ec8d0594f45385

Changes: https://git.openjdk.org/jdk17u-dev/pull/3104/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3104&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299994
  Stats: 40 lines in 2 files changed: 37 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3104.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3104/head:pull/3104

PR: https://git.openjdk.org/jdk17u-dev/pull/3104