Revert back to lsq2 velocity strategy

Switch back to lsq2 while the bugreports for the impulse velocity
tracker strategy are investigated.

Bug: 72263561
Test: this is a revert
Change-Id: I6a2399d91f8c0225df8b90fb452a54aa42fe6894
diff --git a/libs/input/VelocityTracker.cpp b/libs/input/VelocityTracker.cpp
index 57eee12..e54f147 100644
--- a/libs/input/VelocityTracker.cpp
+++ b/libs/input/VelocityTracker.cpp
@@ -107,7 +107,7 @@
 // this is the strategy that applications will actually use.  Be very careful
 // when adjusting the default strategy because it can dramatically affect
 // (often in a bad way) the user experience.
-const char* VelocityTracker::DEFAULT_STRATEGY = "impulse";
+const char* VelocityTracker::DEFAULT_STRATEGY = "lsq2";
 
 VelocityTracker::VelocityTracker(const char* strategy) :
         mLastEventTime(0), mCurrentPointerIdBits(0), mActivePointerId(-1) {