RFR: 8298449: Unnecessary Vector usage in MetaData.ProxyPersistenceDelegate

[Andrey Turbanov]

`Vector<Object> args` is used only in single method and then it converted to `Object[]`.
So we can avoid usage of legacy synchronized `Vector` here and use `ArrayList` instead.

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Commit messages:
 - [PATCH] Unnecessary Vector usage in MetaData.ProxyPersistenceDelegate

Changes: https://git.openjdk.org/jdk/pull/11103/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11103&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298449
  Stats: 7 lines in 1 file changed: 2 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/11103.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11103/head:pull/11103

PR: https://git.openjdk.org/jdk/pull/11103