Add a SCORER_CHANGED broadcast.

Sent whenever the active network scorer is changed.

Bug: 16007033
Change-Id: Ib71e89e2cc98fa424db7e489445ec03edefb6880
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 450a889..e675dc7 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -254,6 +254,7 @@
     <protected-broadcast
             android:name="android.net.ConnectivityService.action.PKT_CNT_SAMPLE_INTERVAL_ELAPSED" />
     <protected-broadcast android:name="android.net.scoring.SCORE_NETWORKS" />
+    <protected-broadcast android:name="android.net.scoring.SCORER_CHANGED" />
     <protected-broadcast android:name="android.intent.action.EXTERNAL_APPLICATIONS_AVAILABLE" />
     <protected-broadcast android:name="android.intent.action.EXTERNAL_APPLICATIONS_UNAVAILABLE" />
     <protected-broadcast android:name="android.intent.action.AIRPLANE_MODE" />