Allowing ListenerView intercept events in system areas

See the discussion in thje bug

Bug: 156044202
Change-Id: I68b3826602250ef163b96be95d80b98691456443

src/com/android/launcher3/AbstractFloatingView.java

@@ -257,4 +257,8 @@ public abstract class AbstractFloatingView extends LinearLayout implements Touch
             @FloatingViewType int type) {
         return getOpenView(activity, type);
     }
+
+    public boolean canInterceptEventsInSystemGestureRegion() {
+        return false;
+    }
 }