Pass through touches in FolderIcon padding area

Pass touch events happening in padding of folder icon to workspace. BubbleTextView already does this.

Bug: 161014416
Test: Manual
Change-Id: Ibfa24adb2d84efbfab36f02a2240837f03858e43
diff --git a/src/com/android/launcher3/folder/FolderIcon.java b/src/com/android/launcher3/folder/FolderIcon.java
index 75275b2..32d061c 100644
--- a/src/com/android/launcher3/folder/FolderIcon.java
+++ b/src/com/android/launcher3/folder/FolderIcon.java
@@ -129,6 +129,8 @@
     private float mDotScale;
     private Animator mDotScaleAnim;
 
+    private Rect mTouchArea = new Rect();
+
     private final PointF mTranslationForReorderBounce = new PointF(0, 0);
     private final PointF mTranslationForReorderPreview = new PointF(0, 0);
     private float mScaleForReorderBounce = 1f;
@@ -711,6 +713,11 @@
 
     @Override
     public boolean onTouchEvent(MotionEvent event) {
+        if (event.getAction() == MotionEvent.ACTION_DOWN
+                && shouldIgnoreTouchDown(event.getX(), event.getY())) {
+            return false;
+        }
+
         // Call the superclass onTouchEvent first, because sometimes it changes the state to
         // isPressed() on an ACTION_UP
         super.onTouchEvent(event);
@@ -719,6 +726,15 @@
         return true;
     }
 
+    /**
+     * Returns true if the touch down at the provided position be ignored
+     */
+    protected boolean shouldIgnoreTouchDown(float x, float y) {
+        mTouchArea.set(getPaddingLeft(), getPaddingTop(), getWidth() - getPaddingRight(),
+                getHeight() - getPaddingBottom());
+        return !mTouchArea.contains((int) x, (int) y);
+    }
+
     @Override
     public void cancelLongPress() {
         super.cancelLongPress();