Apply density scaling when updating from typed array

Ensures that density scaling is applied to default dimension values
where needed. Previously, scaling was only applied when a drawable
was loaded from cached constant state; however, drawables that were
preloaded against a different density and first loaded in some other
density were not scaled.

Bug: 25081461
Change-Id: I0f8058cc01e2fe8d6bd7e255eba40485f3cbe48b