RFR: 8313875: Make fields final in java.util.Math: twoToTheDoubleScaleUp, twoToTheDoubleScaleDown

[Andrey Turbanov]

Couple of static fields in Math could be declared `final`.

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Commit messages:
 - [PATCH] Make fields final in java.util.Math: twoToTheDoubleScaleUp, twoToTheDoubleScaleDown

Changes: https://git.openjdk.org/jdk/pull/14875/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14875&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8313875
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/14875.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14875/head:pull/14875

PR: https://git.openjdk.org/jdk/pull/14875