Use system attr instead of hardcoding for searchbar radius

Change-Id: I41aa10b7fc13271e2d9369fe4dc4e1808a0c1044
Fixes: 123985440
Test: visual
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 935bbf2..84c8831 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -427,7 +427,7 @@
 
     <style name="SearchBarStyle">
         <item name="android:layout_margin">@dimen/search_bar_margin</item>
-        <item name="cardCornerRadius">8dp</item>
+        <item name="cardCornerRadius">@*android:dimen/config_dialogCornerRadius</item>
         <item name="enforceMaterialTheme">true</item>
         <item name="cardElevation">3dp</item>
         <item name="shapeAppearance">@null</item>