Final pass at Material DocumentsUI.

Now with treatment for disabled and selected grid items.  Inverts
text and icons in selected drawer items.  Follows upstream color
changes to accent color.  Disables some verbose logging.

Bug: 15836082, 17281688
Change-Id: I97a1c055a2f1a537388a8f5669147618e9698870
diff --git a/res/layout/item_doc_list.xml b/res/layout/item_doc_list.xml
index c5f1842..c576669 100644
--- a/res/layout/item_doc_list.xml
+++ b/res/layout/item_doc_list.xml
@@ -17,7 +17,7 @@
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:background="@drawable/item_activated">
+    android:background="@drawable/item_doc_list_background">
 
     <LinearLayout
         android:layout_width="match_parent"