DatePicker is calling back its listener on init.

bug:3341515

1.Changed the callbeack registration to follow the spinners
  initialization.

Change-Id: I3baff68c295993f975beec2b376af88e32b24e20

core/java/android/widget/DatePicker.java

@@ -471,8 +471,9 @@ public class DatePicker extends FrameLayout {
      */
     public void init(int year, int monthOfYear, int dayOfMonth,
             OnDateChangedListener onDateChangedListener) {
-        mOnDateChangedListener = onDateChangedListener;
         updateDate(year, monthOfYear, dayOfMonth);
+        // register the callback after updating the date
+        mOnDateChangedListener = onDateChangedListener;
     }
 
     /**