[MaterialDatePicker] Update screen width at which days size is 48dp i…

…n portrait mode.

PiperOrigin-RevId: 521476833

lib/java/com/google/android/material/datepicker/res/values-w480dp-port/dimens.xml → lib/java/com/google/android/material/datepicker/res/values-w400dp-port/dimens.xml

@@ -20,7 +20,6 @@
   <dimen name="mtrl_calendar_bottom_padding">0dp</dimen>
   <dimen name="mtrl_calendar_month_horizontal_padding">0dp</dimen>
 
-
   <dimen name="mtrl_calendar_day_corner">22dp</dimen>
   <dimen name="mtrl_calendar_day_height">48dp</dimen>
   <dimen name="mtrl_calendar_day_width">48dp</dimen>