Support WKST in recurrence rules

RFC 5545 says WKST is significant in weekly rules with nonzero
intervals and BYDAY rules, and also in yearly rules with a BYWEEKNO
part.  Yearly with BYWEEKNO seems to be generally broken, so this
only attempts to correct weekly recurrences.

Bug 1641249

Change-Id: Icad8762be4685036fc50bed0cc75970e774a21a8
3 files changed
tree: 1bb5e6d36e9a7aff0946fd86bfd58c48864b93b8
  1. src/
  2. tests/
  3. Android.mk