Switch back to lsq2 VelocityTracker strategy.

The impulse VelocityTracker strategy is over-estimating
certain injected input events, used for SystemUI jank
performance tests. The current regression is caused by a combination of
improperly spaced input events and the high sensitivity of the new
strategy to that portion of the motion.

Bug: 64680775
Test: bit CtsViewTestCases:.VelocityTrackerTest
Change-Id: I4b387dcc4a13fe4295ee208490c49b2763a6bd19