Updates from API review.

    * AccessibilityService -- document onBind() to not be implemented.
    * GestureLibrary.getLearner() -- needs to be hidden.
    * IntentSender -- remove protected constructors, document that it is retrieved from a PendingIntent.
    * Hide permissions: SHUTDOWN, STOP_APP_SWITCHES.
    * Context -- hide BACKUP_SERVICE.
    * ContextWrapper -- hide getSharedPrefs bla h blah
    * Intent.parseUri() -- fix docs.
    * ApplicationInfo.FLAG_TEST_ONLY?!?
    * Hide MockContext.getSharedPrefs blah blah
diff --git a/core/java/android/gesture/GestureLibrary.java b/core/java/android/gesture/GestureLibrary.java
index a29c2c8..ec2e78c 100644
--- a/core/java/android/gesture/GestureLibrary.java
+++ b/core/java/android/gesture/GestureLibrary.java
@@ -35,6 +35,7 @@
         return false;
     }
 
+    /** @hide */
     public Learner getLearner() {
         return mStore.getLearner();
     }