docs: Update to doc on listening for restrictions-changed intent

Per bug 19848206, it turns out that APPLICATION_RESTRICTIONS_CHANGED
is only sent to dynamically-declared listeners, *not* to listeners
declared in the manifest. Updated doc to note this. (The code snippet
already showed how to dynamically declare a listener.)

See first comment for doc stage location.

bug: 19848206
Change-Id: I19c7150a9f36de226d00ad6d8db0e9210d5d135d
diff --git a/docs/html/training/enterprise/app-restrictions.jd b/docs/html/training/enterprise/app-restrictions.jd
index fc5dfcc..dd2c2c0 100644
--- a/docs/html/training/enterprise/app-restrictions.jd
+++ b/docs/html/training/enterprise/app-restrictions.jd
@@ -316,8 +316,18 @@
   {@link android.content.Intent#ACTION_APPLICATION_RESTRICTIONS_CHANGED
   ACTION_APPLICATION_RESTRICTIONS_CHANGED} intent. Your app has to listen for
   this intent so you can change the app's behavior when the restriction settings
-  change. The following code shows how to dynamically register a broadcast
-  receiver for this intent:
+  change.</p>
+
+<p class="note">
+  <strong>Note:</strong> The {@link
+  android.content.Intent#ACTION_APPLICATION_RESTRICTIONS_CHANGED
+  ACTION_APPLICATION_RESTRICTIONS_CHANGED} intent is sent only to listeners
+  that are dynamically registered, <em>not</em> to listeners that are declared
+  in the app manifest.
+</p>
+<p>
+  The following code shows how to dynamically register a broadcast receiver for
+  this intent:
 </p>
 
 <pre>IntentFilter restrictionsFilter =