add filtering cancelled events in recurrent events

[Serzh470]

Cancelled events in recurrent events displayed as object in google api response:

  {
   "kind": "calendar#event",
   "etag": "\"316514750266000\"",
   "id": "cdj68cj6cgs4b9mckq62b9k6hh64b9pc8r38b9k6ee9l6ti3gc1jck_20200517T070000Z",
   "status": "cancelled",
   "recurringEventId": "cdj68cj6cgsj4b9mckq62b9k6hh64b9pc8r38b9k6ee9l6ti3gc1jck",
   "originalStartTime": {
    "dateTime": "2020-05-17T10:00:00+03:00"
   }
  }

So in current version they are filtered from api response and cancelled event in recurrent queue still shown.

Modification:

• filtering cancelled events in separate array
• check, if each new recurrent event is cancelled