Disable quickswitch for trackpad gestures

Bug: 261815244
Test: make sure (1) if user starts by swiping up, disable quickswitch (they will land either in overview, home, or the current app) (2) if user starts by quick switching, cancel the gesture

Change-Id: I6b59cec0089d5e6f22eee3241c6336345dd15dce

quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java

@@ -2080,7 +2080,11 @@ public abstract class AbsSwipeUpHandler<T extends StatefulActivity<S>,
         runOnRecentsAnimationAndLauncherBound(() ->
                 mRecentsView.setRecentsAnimationTargets(mRecentsAnimationController,
                         mRecentsAnimationTargets));
-        mRecentsViewScrollLinked = true;
+
+        // Disable scrolling in RecentsView for trackpad gestures.
+        if (!mGestureState.isTrackpadGesture()) {
+            mRecentsViewScrollLinked = true;
+        }
     }
 
     private void onRecentsViewScroll() {