Update radius value to 2dp to fit AOSP design.

Update dimen radius value

Bug: 119538360
Test: visual
Change-Id: Id3112cd0b3c11b208e50bfd02f1e7b69c6dde805
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 9a885d1..32a2c8f 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -42,8 +42,8 @@
     <dimen name="dir_elevation">8dp</dimen>
     <dimen name="drag_shadow_size">120dp</dimen>
     <dimen name="grid_item_elevation">2dp</dimen>
-    <dimen name="grid_item_radius">8dp</dimen>
-    <dimen name="grid_item_border_radius">6dp</dimen>
+    <dimen name="grid_item_radius">2dp</dimen>
+    <dimen name="grid_item_border_radius">1dp</dimen>
     <dimen name="max_drawer_width">280dp</dimen>
 
     <dimen name="drawer_edge_width">12dp</dimen>