Merge "Disallow scrolling if workspace is in transition." into ub-launcher3-burnaby-polish

src/com/android/launcher3/Workspace.java

@@ -1542,6 +1542,13 @@ public class Workspace extends PagedView
         mWallpaperOffset.syncWithScroll();
     }
 
+    @Override
+    protected void determineScrollingStart(MotionEvent ev, float touchSlopScale) {
+        if (!isSwitchingState()) {
+            super.determineScrollingStart(ev, touchSlopScale);
+        }
+    }
+
     @Override
     public void announceForAccessibility(CharSequence text) {
         // Don't announce if apps is on top of us.