Support 4-finger gesture to quick switch

Fixes: 270610237
Test: 4-finger horizontal swipe -> quick switch
Change-Id: I981a7e93ecd07357c7a9cda075f476b397c448cc

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

@@ -2063,8 +2063,8 @@ public abstract class AbsSwipeUpHandler<T extends StatefulActivity<S>,
                 mRecentsView.setRecentsAnimationTargets(mRecentsAnimationController,
                         mRecentsAnimationTargets));
 
-        // Disable scrolling in RecentsView for trackpad gestures.
-        if (!mGestureState.isTrackpadGesture()) {
+        // Disable scrolling in RecentsView for trackpad 3-finger swipe up gesture.
+        if (!mGestureState.isThreeFingerTrackpadGesture()) {
             mRecentsViewScrollLinked = true;
         }
     }