Revert "Check whether pointer has stopped at liftoff"

This reverts commit 456acaae9592985f6424cd244c55de9982537f42.
Test: not tested, this is a revert
Bug: 236335820
Reason for revert: breaks NumberPickerTest

Change-Id: I9b1e2002c51e96c52b7bb13f55ae1331ffb4915b
diff --git a/libs/input/tests/VelocityTracker_test.cpp b/libs/input/tests/VelocityTracker_test.cpp
index 4a445de..a87b187 100644
--- a/libs/input/tests/VelocityTracker_test.cpp
+++ b/libs/input/tests/VelocityTracker_test.cpp
@@ -26,9 +26,7 @@
 #include <gui/constants.h>
 #include <input/VelocityTracker.h>
 
-using std::literals::chrono_literals::operator""ms;
-using std::literals::chrono_literals::operator""ns;
-using std::literals::chrono_literals::operator""us;
+using namespace std::chrono_literals;
 using android::base::StringPrintf;
 
 namespace android {
@@ -151,7 +149,8 @@
         if (i == 0) {
             action = AMOTION_EVENT_ACTION_DOWN;
             EXPECT_EQ(1U, pointerCount) << "First event should only have 1 pointer";
-        } else if ((i == motions.size() - 1) && pointerCount == 1) {
+        } else if (i == motions.size() - 1) {
+            EXPECT_EQ(1U, pointerCount) << "Last event should only have 1 pointer";
             action = AMOTION_EVENT_ACTION_UP;
         } else {
             const MotionEventEntry& previousEntry = motions[i-1];
@@ -196,7 +195,7 @@
 
 static void computeAndCheckVelocity(const VelocityTracker::Strategy strategy,
                                     const std::vector<MotionEventEntry>& motions, int32_t axis,
-                                    float targetVelocity, uint32_t pointerId = DEFAULT_POINTER_ID) {
+                                    float targetVelocity) {
     VelocityTracker vt(strategy);
     float Vx, Vy;
 
@@ -205,7 +204,7 @@
         vt.addMovement(&event);
     }
 
-    vt.getVelocity(pointerId, &Vx, &Vy);
+    vt.getVelocity(DEFAULT_POINTER_ID, &Vx, &Vy);
 
     switch (axis) {
     case AMOTION_EVENT_AXIS_X:
@@ -847,71 +846,13 @@
 
     // Velocity should actually be zero, but we expect 0.016 here instead.
     // This is close enough to zero, and is likely caused by division by a very small number.
-    computeAndCheckVelocity(VelocityTracker::Strategy::LSQ2, motions, AMOTION_EVENT_AXIS_X, 0);
-    computeAndCheckVelocity(VelocityTracker::Strategy::LSQ2, motions, AMOTION_EVENT_AXIS_Y, 0);
+    computeAndCheckVelocity(VelocityTracker::Strategy::LSQ2, motions, AMOTION_EVENT_AXIS_X, -0.016);
+    computeAndCheckVelocity(VelocityTracker::Strategy::LSQ2, motions, AMOTION_EVENT_AXIS_Y, -0.016);
     computeAndCheckVelocity(VelocityTracker::Strategy::IMPULSE, motions, AMOTION_EVENT_AXIS_X, 0);
     computeAndCheckVelocity(VelocityTracker::Strategy::IMPULSE, motions, AMOTION_EVENT_AXIS_Y, 0);
 }
 
 /**
- * ================= Pointer liftoff ===============================================================
- */
-
-/**
- * The last movement of a pointer is always ACTION_POINTER_UP or ACTION_UP. If there's a short delay
- * between the last ACTION_MOVE and the next ACTION_POINTER_UP or ACTION_UP, velocity should not be
- * affected by the liftoff.
- */
-TEST_F(VelocityTrackerTest, ShortDelayBeforeActionUp) {
-    std::vector<MotionEventEntry> motions = {
-            {0ms, {{10, 0}}}, {10ms, {{20, 0}}}, {20ms, {{30, 0}}}, {30ms, {{30, 0}}}, // ACTION_UP
-    };
-    computeAndCheckVelocity(VelocityTracker::Strategy::IMPULSE, motions, AMOTION_EVENT_AXIS_X,
-                            1000);
-    computeAndCheckVelocity(VelocityTracker::Strategy::LSQ2, motions, AMOTION_EVENT_AXIS_X, 1000);
-}
-
-/**
- * The last movement of a single pointer is ACTION_UP. If there's a long delay between the last
- * ACTION_MOVE and the final ACTION_UP, velocity should be reported as zero because the pointer
- * should be assumed to have stopped.
- */
-TEST_F(VelocityTrackerTest, LongDelayBeforeActionUp) {
-    std::vector<MotionEventEntry> motions = {
-            {0ms, {{10, 0}}},
-            {10ms, {{20, 0}}},
-            {20ms, {{30, 0}}},
-            {3000ms, {{30, 0}}}, // ACTION_UP
-    };
-    computeAndCheckVelocity(VelocityTracker::Strategy::IMPULSE, motions, AMOTION_EVENT_AXIS_X, 0);
-    computeAndCheckVelocity(VelocityTracker::Strategy::LSQ2, motions, AMOTION_EVENT_AXIS_X, 0);
-}
-
-/**
- * The last movement of a pointer is always ACTION_POINTER_UP or ACTION_UP. If there's a long delay
- * before ACTION_POINTER_UP event, the movement should be assumed to have stopped.
- * The final velocity should be reported as zero for all pointers.
- */
-TEST_F(VelocityTrackerTest, LongDelayBeforeActionPointerUp) {
-    std::vector<MotionEventEntry> motions = {
-            {0ms, {{10, 0}}},
-            {10ms, {{20, 0}, {100, 0}}},
-            {20ms, {{30, 0}, {200, 0}}},
-            {30ms, {{30, 0}, {300, 0}}},
-            {40ms, {{30, 0}, {400, 0}}},
-            {3000ms, {{30, 0}}}, // ACTION_POINTER_UP
-    };
-    computeAndCheckVelocity(VelocityTracker::Strategy::IMPULSE, motions, AMOTION_EVENT_AXIS_X, 0,
-                            /*pointerId*/ 0);
-    computeAndCheckVelocity(VelocityTracker::Strategy::LSQ2, motions, AMOTION_EVENT_AXIS_X, 0,
-                            /*pointerId*/ 0);
-    computeAndCheckVelocity(VelocityTracker::Strategy::IMPULSE, motions, AMOTION_EVENT_AXIS_X, 0,
-                            /*pointerId*/ 1);
-    computeAndCheckVelocity(VelocityTracker::Strategy::LSQ2, motions, AMOTION_EVENT_AXIS_X, 0,
-                            /*pointerId*/ 1);
-}
-
-/**
  * ================== Tests for least squares fitting ==============================================
  *
  * Special care must be taken when constructing tests for LeastSquaresVelocityTrackerStrategy