Fix bug where dragview gets stuck on screen.

* Since the BubbleTextViews views do not have a listener, the long press
  was still getting triggered even though it was in a pressed state.
* We only trigger long press if the view is not pressed or if there is no listener.
* A listener is only added for widgets, and for long press wiidgets are not
  pressed state.

Bug: 162636845
Test: manual test, repo steps in bug
Change-Id: Ia9df12cf31a0844403d69ddacebf2bdbc5c59d3b
(cherry picked from commit 6fa63473e1)

src/com/android/launcher3/CheckLongPressHelper.java

@@ -115,7 +115,7 @@ public class CheckLongPressHelper {
     private void triggerLongPress() {
         if ((mView.getParent() != null)
                 && mView.hasWindowFocus()
-                && (!mView.isPressed() || mListener == null)
+                && (!mView.isPressed() || mListener != null)
                 && !mHasPerformedLongPress) {
             boolean handled;
             if (mListener != null) {