[Adaptive] Removed extra space between the list view container and th…

…e navigation bar.

There was an extra 12dp of margin above the navigation bar that was unnecessary.

PiperOrigin-RevId: 409214343

catalog/java/io/material/catalog/adaptive/res/layout/cat_adaptive_list_view_fragment.xml

@@ -20,8 +20,7 @@
   xmlns:app="http://schemas.android.com/apk/res-auto"
   android:id="@+id/list_view_container"
   android:layout_width="match_parent"
-  android:layout_height="match_parent"
-  android:layout_marginBottom="12dp">
+  android:layout_height="match_parent">
 
   <TextView
     android:id="@+id/inbox_title"