Use public "attr" references for QuickContacts.

Fixes http://b/2329628
diff --git a/res/layout-finger/contacts_list_item_photo.xml b/res/layout-finger/contacts_list_item_photo.xml
index c9b4c1c..73f5ec1 100644
--- a/res/layout-finger/contacts_list_item_photo.xml
+++ b/res/layout-finger/contacts_list_item_photo.xml
@@ -81,15 +81,15 @@
             android:layout_alignParentLeft="true"
             android:layout_centerVertical="true"
             android:layout_marginRight="8dip"
-            style="@*android:style/Widget.QuickContactBadge.WindowMedium" />
+            style="?android:attr/quickContactBadgeStyleWindowMedium"
         />
 
         <ImageView android:id="@+id/noQuickContactPhoto"
             android:layout_alignParentLeft="true"
             android:layout_centerVertical="true"
             android:layout_marginRight="8dip"
-            style="@*android:style/Widget.QuickContactBadge.WindowMedium"
-            android:background="@null" />
+            android:background="@null"
+            style="?android:attr/quickContactBadgeStyleWindowMedium"
         />
 
         <TextView android:id="@+id/label"