[TIMOB-14286][TIMOB-14062]iOS: Fixing Calendar bugs.

TESTING INSTRUCTION IN JIRA - [TIMOB-14286](https://jira.appcelerator.org/browse/TIMOB-14286) [TIMOB-14062](https://jira.appcelerator.org/browse/TIMOB-14062)

In Timob-14286 - i was trying to grab a int from the argument being passed in while functions always receive arguments as arrays.
In Timob-14062 - This iOS's fault where even though the access was not granted the error object being returned is nil .