Fix auto-send of invites when attendee status changes

* Use AS_SYNC_ADAPTER flag when changing attendee information in
  downsyncs
* Allow DTSTAMP to come before new attendee information in the case
  in which only attendees are changing
* Add _SYNC_DATA of "0" for all newly synced events

Bug: 2582513
Change-Id: Iacde0ddf3f2a99d108e00ef1991edfc34613f5c7
1 file changed