Flag is used in method "ShouldUsePinyin()" to avoid calling Alphabet
service. Otherwise, tests applying to StringMatcher.FuzzySearch() would
fail because the pinyin helper library fails to initialize.
The MatchResult will always get the maximum score from either
ScoreForPinyin() or CalculateSearchScore(). ScoreForPinyin() is
completely dependant on the "ShouldUsePinyin" global setting.
The search precision must be used, so it makes sense to apply the filter
directly on score assignment. Score will be "0" if precision filter
was not met.
