Fix menu item highlight color.

Test: m
Change-Id: Ia5852a4de95ff355c6f2cd8275002d3c5cfb8370
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 643d044..442818d 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -361,7 +361,7 @@
         <item name="android:background">@null</item>
     </style>
 
-    <style name="DropDownListViewStyle">
+    <style name="DropDownListViewStyle" parent="Widget.AppCompat.ListView.DropDown">
       <item name="android:dividerHeight">0dp</item>
     </style>