Use event time of app side for latency metrics

There are 2 reasons not to use MotionEvent#getEventTime:
1. There is an existing TouchEventReported metric for touch latency.
2. In instrumentation test, the event time is set when creating
   the motion event for injection. It may cause the results to be
   5 times slower than the real case. That may lead to miss the
   cost from app to system.

Bug: 166614700
Test: Enable statsd log: "adb shell cmd stats print-logs"
      Touch gesture navigation bar or launch app from launcher.
      adb logcat | grep statsd | grep "(48)"
Change-Id: Ica5e7df685fe737bbc3ac60c3ec35bad15466726
diff --git a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
index cc109f6..5d227be 100644
--- a/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
+++ b/quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java
@@ -1479,11 +1479,6 @@
         mGestureEndCallback = gestureEndCallback;
     }
 
-    @Override
-    public long getStartTouchTime() {
-        return mTouchTimeMs;
-    }
-
     protected void linkRecentsViewScroll() {
         SurfaceTransactionApplier.create(mRecentsView, applier -> {
             mTransformParams.setSyncTransactionApplier(applier);
diff --git a/quickstep/src/com/android/quickstep/GestureState.java b/quickstep/src/com/android/quickstep/GestureState.java
index f788996..8d67ee6 100644
--- a/quickstep/src/com/android/quickstep/GestureState.java
+++ b/quickstep/src/com/android/quickstep/GestureState.java
@@ -142,6 +142,9 @@
     private Set<Integer> mPreviouslyAppearedTaskIds = new HashSet<>();
     private int mLastStartedTaskId = -1;
 
+    /** The time when the swipe up gesture is triggered. */
+    private long mSwipeUpStartTimeMs;
+
     public GestureState(OverviewComponentObserver componentObserver, int gestureId) {
         mHomeIntent = componentObserver.getHomeIntent();
         mOverviewIntent = componentObserver.getOverviewIntent();
@@ -343,6 +346,14 @@
         mStateCallback.setState(STATE_RECENTS_ANIMATION_ENDED);
     }
 
+    void setSwipeUpStartTimeMs(long uptimeMs) {
+        mSwipeUpStartTimeMs = uptimeMs;
+    }
+
+    long getSwipeUpStartTimeMs() {
+        return mSwipeUpStartTimeMs;
+    }
+
     public void dump(PrintWriter pw) {
         pw.println("GestureState:");
         pw.println("  gestureID=" + mGestureId);
diff --git a/quickstep/src/com/android/quickstep/RecentsAnimationCallbacks.java b/quickstep/src/com/android/quickstep/RecentsAnimationCallbacks.java
index f319b94..a21c714 100644
--- a/quickstep/src/com/android/quickstep/RecentsAnimationCallbacks.java
+++ b/quickstep/src/com/android/quickstep/RecentsAnimationCallbacks.java
@@ -160,12 +160,5 @@
          * Callback made when a task started from the recents is ready for an app transition.
          */
         default void onTaskAppeared(RemoteAnimationTargetCompat appearedTaskTarget) {}
-
-        /**
-         * The time in milliseconds of the touch event that starts the recents animation.
-         */
-        default long getStartTouchTime() {
-            return 0;
-        }
     }
 }
diff --git a/quickstep/src/com/android/quickstep/TaskAnimationManager.java b/quickstep/src/com/android/quickstep/TaskAnimationManager.java
index 797797f..6f2f86e 100644
--- a/quickstep/src/com/android/quickstep/TaskAnimationManager.java
+++ b/quickstep/src/com/android/quickstep/TaskAnimationManager.java
@@ -119,7 +119,7 @@
                 }
             }
         });
-        final long eventTime = listener.getStartTouchTime();
+        final long eventTime = gestureState.getSwipeUpStartTimeMs();
         mCallbacks.addListener(gestureState);
         mCallbacks.addListener(listener);
         UI_HELPER_EXECUTOR.execute(() -> ActivityManagerWrapper.getInstance()
diff --git a/quickstep/src/com/android/quickstep/TouchInteractionService.java b/quickstep/src/com/android/quickstep/TouchInteractionService.java
index eebb0de..c95ff02 100644
--- a/quickstep/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/src/com/android/quickstep/TouchInteractionService.java
@@ -45,6 +45,7 @@
 import android.os.Bundle;
 import android.os.IBinder;
 import android.os.Looper;
+import android.os.SystemClock;
 import android.util.Log;
 import android.view.Choreographer;
 import android.view.InputEvent;
@@ -447,6 +448,7 @@
                 // onConsumerInactive and wipe the previous gesture state
                 GestureState prevGestureState = new GestureState(mGestureState);
                 GestureState newGestureState = createGestureState(mGestureState);
+                newGestureState.setSwipeUpStartTimeMs(SystemClock.uptimeMillis());
                 mConsumer.onConsumerAboutToBeSwitched();
                 mGestureState = newGestureState;
                 mConsumer = newConsumer(prevGestureState, mGestureState, event);
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index ab8d7a5..699734c 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -1829,7 +1829,7 @@
                 mTouchInProgress = true;
                 break;
             case MotionEvent.ACTION_UP:
-                mLastTouchUpTime = ev.getEventTime();
+                mLastTouchUpTime = SystemClock.uptimeMillis();
                 // Follow through
             case MotionEvent.ACTION_CANCEL:
                 mTouchInProgress = false;