title: When ContentResolver.notifyChange() is called for a given URI, are ContentObservers observing descendent URIs of this URI notified?
body: <p>A hopefully straightforward question: When <code>ContentResolver.notifyChange()</code> is called for a given URI, are <code>ContentObserver</code>s observing <em>descendent</em> URIs of this URI notified?</p>
  
  <p>E.g. Say I have a cursor setup to observer the URI of a specific resource:</p>
  
  <pre><code> Uri uriA = Uri.parse("content://" + AUTHORITY + "/orders/21");
   cursor.setNotificationUri(getContext().getContentResolver(), uriA);
  </code></pre>
  
  <p>I then notify the <code>ContentResolver</code> of a change to an ancestor of this URI (e.g. because I have deleted all orders):</p>
  
  <pre><code> Uri uriB = Uri.parse("content://" + AUTHORITY + "/orders");
   getContext().getContentResolver().notifyChange(uriB, null);
  </code></pre>
  
  <p>Would my <code>Cursor</code>, registered to observe <code>uriA</code>, be notified?</p>