Add 2 pixels to top of Advanced Options component

- Hide the edges of text appearing as a quick fix suggested by the UX
  team.

- See the result screenshot in b/218307103#comment18

Bug: 218307103
Test: manual test by pixel device
Change-Id: I11bfdf57ff4d57786e40f49ad747a35efe2bb207

res/layout/wifi_dialog.xml

@@ -353,6 +353,7 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 style="@style/wifi_item"
+                android:paddingTop="2dp"
                 android:paddingBottom="4dp"
                 android:importantForAccessibility="no"
                 android:visibility="gone">