Move CATEGORY_NOTIFICATION_PREFERENCES to Notification.

It sprouts an additional INTENT_ prefix to distinguish it
from the Notification.category constants in the same file.

Bug: 15022240
Change-Id: Icbc09bfc5ce78964272def66934fe4a7c848e12b
diff --git a/core/java/android/app/Notification.java b/core/java/android/app/Notification.java
index 72b5cd90..a1cdf59 100644
--- a/core/java/android/app/Notification.java
+++ b/core/java/android/app/Notification.java
@@ -17,6 +17,8 @@
 package android.app;
 
 import android.annotation.IntDef;
+import android.annotation.SdkConstant;
+import android.annotation.SdkConstant.SdkConstantType;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
@@ -74,6 +76,15 @@
     private static final String TAG = "Notification";
 
     /**
+     * An activity that provides a user interface for adjusting notification preferences for its
+     * containing application. Optional but recommended for apps that post
+     * {@link android.app.Notification Notifications}.
+     */
+    @SdkConstant(SdkConstantType.INTENT_CATEGORY)
+    public static final String INTENT_CATEGORY_NOTIFICATION_PREFERENCES
+            = "android.intent.category.NOTIFICATION_PREFERENCES";
+
+    /**
      * Use all default values (where applicable).
      */
     public static final int DEFAULT_ALL = ~0;