RFR: JDK-8288609: Update --release 19 symbol information for JDK 19 build 28

[Joe Darcy]

Update symbol information in JDK 20 for the latest JDK 19 build.

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Commit messages:
 - JDK-8288609: Update --release 19 symbol information for JDK 19 build 28

Changes: https://git.openjdk.org/jdk/pull/9270/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9270&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288609
  Stats: 32 lines in 4 files changed: 13 ins; 13 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/9270.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9270/head:pull/9270

PR: https://git.openjdk.org/jdk/pull/9270