Sleep-timer duration strings (durationHoursMinutesSeconds, durationMinutesSeconds,
durationMinutesOnly, durationSecondsOnly) contained literal "?" characters instead
of the native hour/minute/second abbreviation in 6 locales. Replaced with correct
native short-form units per locale, verified byte-exact against a pinned spec table
and against the already-correct neighboring hoursLabel/minutesLabel/secondsLabel
values in each file.
