Update java.time.Duration partially to 11+28

Updated javadocs.

Imported methods:
 * long dividedBy(Duration divisor)
 * long toDaysPart()
 * int toHoursPart()
 * int toMinutesPart()
 * int toSecondsPart()
 * int toMillisPart()
 * int toNanosPart()
 * Duration truncatedTo(TemporalUnit)

Test: atest CtsLibcoreOjTestCases:tck.java.time.TCKDuration
Change-Id: Ie976bec8224cd7eb0e2d91956b081202fdb022a6
3 files changed