Hide XML adapter sample, since the APIs are now gone.

Also tweak API demos to use the new pretty background.

Change-Id: Idbb523880fff81f6e0f3ca241e4bdaa1dbc2f8f2
diff --git a/samples/ApiDemos/res/layout-land/fragment_layout.xml b/samples/ApiDemos/res/layout-land/fragment_layout.xml
index a057bf8..c1ef203 100644
--- a/samples/ApiDemos/res/layout-land/fragment_layout.xml
+++ b/samples/ApiDemos/res/layout-land/fragment_layout.xml
@@ -27,7 +27,8 @@
             android:layout_width="0px" android:layout_height="match_parent" />
 
     <FrameLayout android:id="@+id/details" android:layout_weight="1"
-            android:layout_width="0px" android:layout_height="match_parent" />
+            android:layout_width="0px" android:layout_height="match_parent"
+            android:background="?android:attr/detailsElementBackground" />
     
 </LinearLayout>
 <!-- END_INCLUDE(layout) -->
diff --git a/samples/XmlAdapters/Android.mk b/samples/XmlAdapters/Android.mk
index 24a3327..3224bbe 100644
--- a/samples/XmlAdapters/Android.mk
+++ b/samples/XmlAdapters/Android.mk
@@ -10,7 +10,8 @@
 
 LOCAL_PROGUARD_ENABLED := disabled
 
-include $(BUILD_PACKAGE)
+# XXX These APIs are not yet available in the platform.
+#include $(BUILD_PACKAGE)
 
 # Use the following include to make our test apk.
-include $(call all-makefiles-under,$(LOCAL_PATH))
+#include $(call all-makefiles-under,$(LOCAL_PATH))