Adopt end animation callback adjustment for QSIconViewImplTest

With Animator.setPostNotifyEndListenerEnabled set to true
(for excluding potential heavy operation from last animating frame),
the end callback will be notified on next frame. So make the test
compatible with the behavior.

See Idb7be51f5d01e080f2375dd3d022915d48b5cc53

Bug: 300035126
Flag: com.android.window.flags.system_ui_post_animation_end
Test: atest SystemUITests:QSIconViewImplTest_311121830
Change-Id: I78c020e944d5206c7aadfa3e524d410916ab4270