Revert^2 "Update cell drop visualizer radius"

This reverts commit 311afc6987fb0acc8b6fe37ac8f2633067fc5e20.

Reason for revert: Resubmitting with updated screenshots

Change-Id: Ieb114c06376cf46b90b140490a54cbae592c8f5a
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 6c9a238..3672fee 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -432,7 +432,7 @@
     <dimen name="split_instructions_bottom_margin_phone_portrait">60dp</dimen>
 
     <!-- Workspace grid visualization parameters -->
-    <dimen name="grid_visualization_rounding_radius">28dp</dimen>
+    <dimen name="grid_visualization_rounding_radius">16dp</dimen>
     <dimen name="grid_visualization_horizontal_cell_spacing">6dp</dimen>
     <dimen name="grid_visualization_vertical_cell_spacing">6dp</dimen>