Fix wrong layout after quick switch back to a split pair

The remote animation for entering split screen will be canceled if it's
triggering by quick-switch gesture. Add back logic to update surface
bounds after animation got canceled which were accidently removed by
Icaabf2e1.

Fix: 244671191
Test: won't have any side empty after quick siwtched to a split pair
Test: atest WMShellFlickerTests
Change-Id: I520e594188e03fda2619be3fb22455e7d8b06d41