DayPickerView - clamp date to min/max

Besides clamping @ setMinDate() and setMaxDate() also
clamp @ setDate().

Bug: 36636681
Bug: 62485314
Test: cts-tradefed run cts-dev -m CtsWidgetTestCases -t
      android.widget.cts.CalendarViewTest#testMinMaxRangeClampingMaterial

Change-Id: I455cd43e7228e10d58b5f886dcab8332bca72de7