Change ItemBackground for Black Theme

Change-Id: I9330539f3696094d66642f8c6d88515f2b69a221
diff --git a/res/layout/time_zone_item.xml b/res/layout/time_zone_item.xml
index e4b92bf..1933712 100644
--- a/res/layout/time_zone_item.xml
+++ b/res/layout/time_zone_item.xml
@@ -19,7 +19,7 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_gravity="center_vertical"
-    android:background="?android:attr/selectableItemBackground"
+    android:background="?android:attr/itemBackground"
     android:gravity="center_vertical"
     android:orientation="vertical"
     android:paddingLeft="20dp"