Ensure that we dont set gravity in pin...

when the scale of the pin view is not 1f. In the delete animation, we
are setting the width of the view to be less than 1f scale, which is
confusing the logic that is set in onLayout. Therefore, we delete and
enter a pin dot very quickly, the gravity can inadvertently be set to
END.

Fixes: 295937541
Fixes: 304519015
Fixes: 290173541
Fixes: 290807410
Test: enter key and delete key very quickly in pin screen. Also enter
enough pin dots to exceed width of the phone.
Flag: NONE

Change-Id: Icd5461dbf56951b79e2876f7ba15e5e56ac61007