base

Adding title for the date picker dialog if the calendar is not shown.

1. The date picker dialog shows spinners and a mini calendar on
   tablet but on on phone the calendar is not show and the user
   does not know the day of the week otherwise show on the mini
   calendar.

bug:5264972

Change-Id: I06aeb7ba1ad34d4e99628d9586ff2777e981c963