Ignore events that occur between app icons on the taskbar

Bug: 297325541
Flag: com.android.launcher3.show_taskbar_pinning_popup_from_anywhere
Test: manual, flip the flag, long-click between taskbar items
Change-Id: If2ee00f31fcd1788bac2c2c0cd78ba1eada86115

quickstep/src/com/android/launcher3/taskbar/TaskbarViewCallbacks.java

@@ -202,6 +202,10 @@ public class TaskbarViewCallbacks {
     private class TaskbarViewGestureListener extends GestureDetector.SimpleOnGestureListener {
         @Override
         public boolean onDown(@NonNull MotionEvent event) {
+            if (event.isFromSource(InputDevice.SOURCE_MOUSE)
+                    && event.getButtonState() == MotionEvent.BUTTON_SECONDARY) {
+                maybeShowPinningView(event);
+            }
             return true;
         }
 
@@ -211,11 +215,16 @@ public class TaskbarViewCallbacks {
         }
 
         @Override
-        public void onLongPress(MotionEvent event) {
-            if (DisplayController.isPinnedTaskbar(mActivity)) {
-                mControllers.taskbarPinningController.showPinningView(mTaskbarView,
-                        event.getRawX());
+        public void onLongPress(@NonNull MotionEvent event) {
+            maybeShowPinningView(event);
+        }
+
+        private void maybeShowPinningView(@NonNull MotionEvent event) {
+            if (!DisplayController.isPinnedTaskbar(mActivity) || mTaskbarView.isEventOverAnyItem(
+                    event)) {
+                return;
             }
+            mControllers.taskbarPinningController.showPinningView(mTaskbarView, event.getRawX());
         }
     }
 }