Minor UI polish for Grid section view

Before: https://screenshot.googleplex.com/9S92Jkjodo36yed.png
After: https://screenshot.googleplex.com/AMyWUvQjESjpJ6P.png

Bug: 188516619
Test: Manually
Change-Id: Iaacb24f94046d61aaaf0558ed83080c3be2a8730
diff --git a/res/layout/grid_section_view.xml b/res/layout/grid_section_view.xml
index b10b894..ee7b76f 100644
--- a/res/layout/grid_section_view.xml
+++ b/res/layout/grid_section_view.xml
@@ -20,7 +20,7 @@
     android:layout_height="wrap_content"
     android:background="?selectableItemBackground"
     android:clickable="true"
-    android:paddingTop="@dimen/section_top_padding"
+    android:paddingVertical="@dimen/section_top_padding"
     android:paddingHorizontal="@dimen/section_horizontal_padding"
     android:orientation="horizontal">