Ensure bounds are updated together.

Bug 37156683

The animator was setting the value twice on the first run, so
the bounds was being set improperly as the top/left was being
set from a different frame than the bottom/right.

Test: I534cc4d7534cff1206ea8c2b222e0c0852fc0e9c
Change-Id: I6fb047d2fa4d0ed0db3b44107f9815a65f1f2676