Fix bug #3021653 (Clean CalendarProvider2 logging) - DO NOT MERGE

- use Log.isLoggable() pattern
- add a log when dtStart2445 and dtEnd2445 are null at the same time in EventsRawTimes table
- make get2445ToMillis() less verbose

Change-Id: Ib1a560bc6732fa5c1569b56b0789a383cc4f34e5
1 file changed