Use translation shift setter when showing AllApps without animation.

The no-animation case used to be handled immediately upon inflating the
view, so we got away with reassigning the field to
TRANSLATION_SHIFT_OPENED directly. Since this happens in post of a
handler, we need to instead use the setter so that a relayout happens.

Test: Manual
Fix: 324268840
Flag: N/A
Change-Id: I089f15a8d64e0d22885ae387679214a540790ad0