RFR: 8299199: Avoid redundant split calls in FontConfiguration.initReorderMap implementations

[Andrey Turbanov]

`FontConfiguration.split` uses legacy synchronized `Vector` class. But actually there is no need to use it, because input arguments are known at compile time. Instead of split usages we can just create String[] array with filled values directly.

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Commit messages:
 - [PATCH] Avoid redundant split calls in FontConfiguration implementations

Changes: https://git.openjdk.org/jdk/pull/11754/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11754&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299199
  Stats: 9 lines in 3 files changed: 0 ins; 7 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/11754.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11754/head:pull/11754

PR: https://git.openjdk.org/jdk/pull/11754