TRDS:[datetimepicker] Dark Calendar (2/2)

made hardcoded datetimepicker themeable

Change-Id: Ib5aa43fa6b4bf53bfc882589d00a58643fd6b215
trds: darker time picker [for red theme]

DeskClock is using red theme for time picker w/c is already dark
let's make it more darker

Change-Id: I829265c9e489a548bff74a199249b4f165ba2f92