<i18n dev> RFR: 8317952: C-style array declarations in jdk.internal.icu

[Per Minborg]

This PR proposes to replace C-style array declarations with Java array declarations.

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Commit messages:
 - Update copyright year
 - Replace C-style array declarations

Changes: https://git.openjdk.org/jdk/pull/16146/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16146&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8317952
  Stats: 23 lines in 2 files changed: 0 ins; 0 del; 23 mod
  Patch: https://git.openjdk.org/jdk/pull/16146.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16146/head:pull/16146

PR: https://git.openjdk.org/jdk/pull/16146