RFR: 8325081: Move '_soft_ref_policy' to 'CollectedHeap' [v2]

[Lei Zaakjyu]

> trivial

Lei Zaakjyu has updated the pull request incrementally with one additional commit since the last revision:

  construct '_soft_ref_policy' explicitly

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Changes:
  - all: https://git.openjdk.org/jdk/pull/17693/files
  - new: https://git.openjdk.org/jdk/pull/17693/files/d1eff994..be6500d0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17693&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17693&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17693.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17693/head:pull/17693

PR: https://git.openjdk.org/jdk/pull/17693