TimePicker: Support pattern symbol "B"

[droshev]

Is this a bug, enhancement, or feature request?

enhancement

Describe your proposal.

Beginning in CLDR 32, there are 5 additional time patterns that indicate how times should be formatted using day period ranges 'B'. This allows locales to have formats for day period ranges that can display the range symbol in a different position than might be used for symbols for AM, PM, noon, or midnight.

https://cldr.unicode.org/translation/date-time/date-time-patterns

more info - fundamental-library/issues/5