RFR: 8295372: CompactNumberFormat handling of number one with decimal part

[Naoto Sato]

Plurals were determined only by looking at the integer part of the compact number. Changed to consider the fraction digits as well.

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Commit messages:
 - 8295372: CompactNumberFormat handling of number one with decimal part

Changes: https://git.openjdk.org/jdk/pull/10748/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10748&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295372
  Stats: 80 lines in 2 files changed: 35 ins; 2 del; 43 mod
  Patch: https://git.openjdk.org/jdk/pull/10748.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10748/head:pull/10748

PR: https://git.openjdk.org/jdk/pull/10748