Fix issue 5639994: disabled multi-touch on folders

Change-Id: I95bb0089e7522db88dea56281a375f9c98ece460
diff --git a/src/com/android/launcher2/Folder.java b/src/com/android/launcher2/Folder.java
index a6757d7..fdde4d5 100644
--- a/src/com/android/launcher2/Folder.java
+++ b/src/com/android/launcher2/Folder.java
@@ -156,6 +156,7 @@
         super.onFinishInflate();
         mContent = (CellLayout) findViewById(R.id.folder_content);
         mContent.setGridSize(0, 0);
+        mContent.getChildrenLayout().setMotionEventSplittingEnabled(false);
         mFolderName = (FolderEditText) findViewById(R.id.folder_name);
         mFolderName.setFolder(this);
         mFolderName.setOnFocusChangeListener(this);