Add NetworkScoreManager.disableScoring().

Allows the active scorer app to disable itself.

Change-Id: I7bcdc3aafb95af4ea0b110b01b08ab4daf7a137f
diff --git a/core/java/android/net/NetworkScoreManager.java b/core/java/android/net/NetworkScoreManager.java
index b497c6e..2fc3892 100644
--- a/core/java/android/net/NetworkScoreManager.java
+++ b/core/java/android/net/NetworkScoreManager.java
@@ -205,6 +205,20 @@
     }
 
     /**
+     * Turn off network scoring.
+     *
+     * <p>May only be called by the current scorer app, or the system.
+     *
+     * @throws SecurityException if the caller is neither the active scorer nor the system.
+     */
+    public void disableScoring() throws SecurityException {
+        try {
+            mService.disableScoring();
+        } catch (RemoteException e) {
+        }
+    }
+
+    /**
      * Request scoring for networks.
      *
      * <p>Note that this is just a helper method to assemble the broadcast, and will run in the