fix(#Magnification): fix WindowMagnificationAnimationControllerTest test case...

fix(#Magnification): fix WindowMagnificationAnimationControllerTest test case fails on cf_x86_64 devices

On cf_x86_64 devices, smaller animation duration might cause the mainthread loading too intense, therefore the Instrumentation.runOnMainSync would take too much time dispatching task to mainthread. This would make the ValueAnimator does not work as expected. Therefore, we increase the animation duration to decrease the dispatching time.

Bug: 288926821
Test: atest WindowMagnificationAnimationControllerTest on cf_x86_64_phone and via abtd
Change-Id: If0ea2df64f58b9032d629446da74c15b6e691db5