RFR: 8321018: Parallel: Make some methods in ParCompactionManager private

Wed Nov 29 15:05:42 UTC 2023

Trivial reducing visibility of some methods.

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Commit messages:
 - pgc-private-field

Changes: https://git.openjdk.org/jdk/pull/16885/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16885&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321018
  Stats: 3 lines in 1 file changed: 1 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16885.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16885/head:pull/16885

PR: https://git.openjdk.org/jdk/pull/16885