Revert "Make VelocityTracker 1D"

Revert "Conform to 1D VelocityTracker"

Revert submission 19762050-generic_vt

Reason for revert: b/245842062
Reverted Changes:
I181af7a03:Make VelocityTracker 1D
Ib0be0fc38:Conform to 1D VelocityTracker

Change-Id: Ife5675e4abdf154eb6466f687e52b6a427860d26
diff --git a/include/input/VelocityControl.h b/include/input/VelocityControl.h
index f4c7061..1acc2ae 100644
--- a/include/input/VelocityControl.h
+++ b/include/input/VelocityControl.h
@@ -98,7 +98,7 @@
     VelocityControlParameters mParameters;
 
     nsecs_t mLastMovementTime;
-    float mRawPositionX, mRawPositionY;
+    VelocityTracker::Position mRawPosition;
     VelocityTracker mVelocityTracker;
 };