haodong 6694175a5f Fixed getDayCopy utility function in UtcDates for DatePicker.
- was copying year/month/date fields between Calendar objects in different time zones.
- convert input Calendar object into a Calendar object in UTC, then copy year/month/date fields to the return Calendar object.

PiperOrigin-RevId: 284597830
2019-12-10 07:22:59 -05:00
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2019-09-12 13:48:16 -04:00