Fix #2420732 (crash in Google Services Framework)

* Exchange calendar sync created Event records for exceptions
  that didn't have a _sync_id
* This caused google calendar sync to try to upload these
  Events as new, which caused an Exception to be thrown
* Fixed EAS calendar sync adapter to generate a _sync_id for
  exceptions in the form <parentId>_<exception start time>

Bug: 2420732
Change-Id: I46769175ca89ffa4cec4fe8b0c35ef2242536185
1 file changed