am 16422b25: Merge changes If241e329,Ib69b6987 into mnc-dev

* commit '16422b25f7a814be0c3ceba44a4e9e62b10427a5':
  Clarify docs on registerContentObserver.
  Add missing docs to StateSet.

core/java/android/content/ContentResolver.java

@@ -1552,23 +1552,21 @@ public abstract class ContentResolver {
      *
      * @param uri The URI to watch for changes. This can be a specific row URI, or a base URI
      * for a whole class of content.
-     * @param notifyForDescendents If <code>true</code> changes to URIs beginning with <code>uri</code>
-     * will also cause notifications to be sent. If <code>false</code> only changes to the exact URI
-     * specified by <em>uri</em> will cause notifications to be sent. If <code>true</code>, any URI values
-     * at or below the specified URI will also trigger a match.
+     * @param notifyForDescendents When false, the observer will be notified whenever a
+     * change occurs to the exact URI specified by <code>uri</code> or to one of the
+     * URI's ancestors in the path hierarchy.  When true, the observer will also be notified
+     * whenever a change occurs to the URI's descendants in the path hierarchy.
      * @param observer The object that receives callbacks when changes occur.
      * @see #unregisterContentObserver
      */
     public final void registerContentObserver(Uri uri, boolean notifyForDescendents,
-            ContentObserver observer)
-    {
+            ContentObserver observer) {
         registerContentObserver(uri, notifyForDescendents, observer, UserHandle.myUserId());
     }
 
     /** @hide - designated user version */
     public final void registerContentObserver(Uri uri, boolean notifyForDescendents,
-            ContentObserver observer, int userHandle)
-    {
+            ContentObserver observer, int userHandle) {
         try {
             getContentService().registerContentObserver(uri, notifyForDescendents,
                     observer.getContentObserver(), userHandle);

core/java/android/util/StateSet.java

@@ -119,7 +119,14 @@ public class StateSet {
     /** @hide */
     public StateSet() {}
 
+    /**
+     * A state specification that will be matched by all StateSets.
+     */
     public static final int[] WILD_CARD = new int[0];
+
+    /**
+     * A state set that does not contain any valid states.
+     */
     public static final int[] NOTHING = new int[] { 0 };
 
     /**