RFR: JDK-8275688: Suppress warnings on non-serializable non-transient instance fields in DualPivotQuicksort [v2]

[Joe Darcy]

> This should be the last core libraries cleanup of  non-serializable non-transient instance fields ahead of the upcoming javac lint warnings: https://mail.openjdk.java.net/pipermail/jdk-dev/2021-October/006166.html

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Update copyright.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6058/files
  - new: https://git.openjdk.java.net/jdk/pull/6058/files/126782c3..72176dfe

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6058&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6058&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6058.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6058/head:pull/6058

PR: https://git.openjdk.java.net/jdk/pull/6058