[Toast] Fix ANR when tapping on rich card chip.

This method recursively looks up the view hierarchy for a suitable view
to animate. The wrong variable was causing an infinite loop by never
updating the object being checked for the end condition.

With the fix, the animation behaves as expected.

Fix: 302568434
Flag: ENABLE_SEARCH_RESULT_LAUNCH_ANIMATION
Test: see video in the bug.
Change-Id: I123e50f1618a1e48256c0c976eeb46c93e8391b2