RFR: JDK-8322782: Clean up usages of unnecessary fully qualified class name "java.util.Arrays"

[Matthias Baesken]

In [JDK-8322772](https://bugs.openjdk.org/browse/JDK-8322772) one similar cleanup has been proposed before (and was done in the change). But there are a number of other places in the codebase where the import is done and still the unneeded fully qualified class name "java.util.Arrays" is used so more cleanups can be done.

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Commit messages:
 - JDK-8322782

Changes: https://git.openjdk.org/jdk/pull/17241/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17241&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8322782
  Stats: 19 lines in 8 files changed: 0 ins; 0 del; 19 mod
  Patch: https://git.openjdk.org/jdk/pull/17241.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17241/head:pull/17241

PR: https://git.openjdk.org/jdk/pull/17241