Make drop down sort widget match MD.

Test: Manual tests. Auto tests pass.
Bug: 35810701
Change-Id: I148c21476e0e9a5af8e359f9c3e8bbe16dd07a75
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 7e76612..23c2577 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -51,8 +51,8 @@
     <dimen name="doc_header_sort_icon_size">16dp</dimen>
     <dimen name="doc_header_height">60dp</dimen>
 
-    <dimen name="dropdown_sort_widget_margin">20dp</dimen>
-    <dimen name="dropdown_sort_widget_icon_size">30dp</dimen>
+    <dimen name="dropdown_sort_widget_margin">12dp</dimen>
+    <dimen name="dropdown_sort_widget_size">36dp</dimen>
 
     <dimen name="drop_icon_height">14dp</dimen>
     <dimen name="drop_icon_width">14dp</dimen>