Fix layout with no access points

The "Searching for Wi-Fi" message was filling it's view parent,
pushing the "Other network..." option and Skip button out of view.

Bug: 7335738
Change-Id: I6fd1ceff67e04385c6e325ec4bb8a2e30f38c924

res/layout/setup_preference.xml

@@ -97,7 +97,8 @@
         <TextView
             android:id="@android:id/empty"
             android:layout_width="match_parent"
-            android:layout_height="match_parent"
+            android:layout_height="0px"
+            android:layout_weight="1"
             android:gravity="center"
             android:visibility="gone" />