Hide travel abroad button initially.

Bug: 30632031

This button needs to be initially hidden so user can't accidentally
click it before data is ready.

Change-Id: I8cdd1f68bdcb5ba7ecbde34e72d85a5da1fa4a3d

res/layout/support_offline_escalation_options.xml

@@ -64,5 +64,6 @@
         style="@style/SupportSecondaryButton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:minHeight="48dp"/>
+        android:minHeight="48dp"
+        android:visibility="gone"/>
 </LinearLayout>