Remove raw coordinates VelocityTracker workaround

VelocityTracker uses raw coordinates starting in P, so it is no longer
necessary to adjust the MotionEvent to the screen coordinates in order
to get the correct velocities.

Bug: 72263561
Test: manual test - interaction with notification panel and quick
settings. Tried to fling it different ways (starting point, fling speed,
simple liftoff without flinging) and ensured that no unusual behaviour
is observed.

Change-Id: I19590ddeab1054a59b2671d6ef0ef7027509f863