Avoid mockito in MotionPredictorBenchmark

Mockito dominates the time to create MotionPredictor, and
it can be avoided.

The median time reduces from ~39614ns to ~683ns. (-98%).

Bug: 321913450
Test:  atest CorePerfTests:android.input.MotionPredictorBenchmark
Change-Id: Idea21b5627a25af8d5941bb8c7a1ff567eb2504d
2 files changed