Added a developer option to save attribute data.

After the checkbox for 'Enable view attribute inspection' is checked,
newly constructed Views will save their attribute data.

Change-Id: Ia6d150d0d9991a2341236a9d35055b811038c849

res/xml/development_prefs.xml

@@ -86,6 +86,10 @@
             android:title="@string/allow_mock_location"
             android:summary="@string/allow_mock_location_summary"/>
 
+        <CheckBoxPreference
+                android:key="debug_view_attributes"
+                android:title="@string/debug_view_attributes" />
+
         <PreferenceScreen android:key="debug_app"
                 android:title="@string/debug_app" />