Rename BROADCAST_SCORE_NETWORKS to BROADCAST_NETWORK_PRIVILEGED.

This is necessary/desired for two reasons:

1. UX around network scoring shipped with L despite lacking underlying
platform support. We do not want network scoring applications to
trigger this UX on L devices, and therefore we must break the contract
of what defines a network scorer so that apps build against the new
contract don't trigger the old UX.

2. As a start towards generalizing the term "score" for a potentially
broader role in the future, though that role is very much undefined.

Bug: 18160480
Change-Id: If228977513e32e45bc44dbeda24aa18436fdfca6
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 8e0cd52..db7174e 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -2500,11 +2500,12 @@
         android:description="@string/permdesc_broadcastWapPush"
         android:protectionLevel="signature" />
 
-    <!-- @SystemApi Allows an application to broadcast a SCORE_NETWORKS request.
+    <!-- @SystemApi Allows an application to broadcast privileged networking requests.
          <p>Not for use by third-party applications. @hide -->
-    <permission android:name="android.permission.BROADCAST_SCORE_NETWORKS"
-        android:label="@string/permlab_broadcastScoreNetworks"
-        android:description="@string/permdesc_broadcastScoreNetworks"
+    <permission android:name="android.permission.BROADCAST_NETWORK_PRIVILEGED"
+        android:permissionGroup="android.permission-group.NETWORK"
+        android:label="@string/permlab_broadcastNetworkPrivileged"
+        android:description="@string/permdesc_broadcastNetworkPrivileged"
         android:protectionLevel="signature|system" />
 
     <!-- @SystemApi Not for use by third-party applications. -->