Use padding instead of margin so that it only applies to list "top".

Bug: 15332945
Change-Id: Ic51b49ea57a4c6f1072bab701697d72c92f2601b
diff --git a/res/layout/show_all_contacts_fragment.xml b/res/layout/show_all_contacts_fragment.xml
index 1de5ee5..91fb322 100644
--- a/res/layout/show_all_contacts_fragment.xml
+++ b/res/layout/show_all_contacts_fragment.xml
@@ -40,7 +40,7 @@
             android:layout_height="match_parent"
             android:layout_marginStart="?attr/contact_browser_list_padding_left"
             android:layout_marginEnd="?attr/contact_browser_list_padding_right"
-            android:layout_marginTop="18dp"
+            android:paddingTop="18dp"
             android:fastScrollEnabled="true"
             android:fadingEdge="none"
             android:nestedScrollingEnabled="true" />