Calculate predictions based on PointerCoords data

Previously, the predictions were based on the MotionEvent's getRawX,
getRawY APIs, which do some additional processing on the values of the
PointerCoords.

That caused the prediction API to work correctly in portrait mode, but
not in landscape, because the transform was getting missed.

Now, we will use the PointerCoords directly. Confirmed that this fixes
the issue in both portrait and landscape modes.

Bug: 210158587
Test: m MotionPrediction && adb install $ANDROID_PRODUCT_OUT/system/app/MotionPrediction/MotionPrediction.apk
Change-Id: Iba0667226d802ab344ec689c654f9cfbf073b622