Hide divider immediately if going to launcher

Divider should hide immediately when going to launcher, this fix
the divider hidden delay in 3-btn-nav mode.

Fix: 283058496
Test: manual
Test: pass existing tests
Change-Id: Ia4eaba8020c564cc95b8652fe0f7066b653b9df4

quickstep/src/com/android/launcher3/QuickstepTransitionManager.java

@@ -1702,6 +1702,7 @@ public class QuickstepTransitionManager implements OnDeviceProfileChangeListener
                     QuickStepContract.getWindowCornerRadius(mLauncher),
                     false /* fromPredictiveBack */);
 
+            TaskViewUtils.createSplitAuxiliarySurfacesAnimator(nonAppTargets, false, null);
             mLauncher.clearForceInvisibleFlag(INVISIBLE_ALL);
             result.setAnimation(pair.second, mLauncher);
         }