Specifies descendantFocusability to Folder view.

When a folder is opened by mouse or touch, the Folder view itself
obtains the focus rather than the views inside of the folder
which causes the reported bug.

Bug: 22562679
Change-Id: Ia4ccc59ca27e560e470122d1b2c6c1eccb4caf9a
diff --git a/res/layout/user_folder.xml b/res/layout/user_folder.xml
index ecf7def..bf32789 100644
--- a/res/layout/user_folder.xml
+++ b/res/layout/user_folder.xml
@@ -20,7 +20,8 @@
     android:layout_height="wrap_content"
     android:background="@drawable/quantum_panel"
     android:elevation="5dp"
-    android:orientation="vertical" >
+    android:orientation="vertical"
+    android:descendantFocusability="afterDescendants" >
 
     <FrameLayout
         android:id="@+id/folder_content_wrapper"