Adding a new internal method to get all valid scorers.

New NetworkScoreManager method to get all valid scorers from the
NetworkScoreService. The implementation is stubbed out for the time
being.

Test: make
Bug: 35095406
Change-Id: Iece2cc10a0a9377f2d82385d172b06660bb9b130
diff --git a/services/core/java/com/android/server/NetworkScoreService.java b/services/core/java/com/android/server/NetworkScoreService.java
index 0ac51b9..f9b5db6 100644
--- a/services/core/java/com/android/server/NetworkScoreService.java
+++ b/services/core/java/com/android/server/NetworkScoreService.java
@@ -718,6 +718,15 @@
         return null;
     }
 
+    /**
+     * Returns the list of available scorer apps. The list will be empty if there are
+     * no valid scorers.
+     */
+    @Override
+    public List<NetworkScorerAppData> getAllValidScorers() {
+        return mNetworkScorerAppManager.getAllValidScorers();
+    }
+
     @Override
     public void disableScoring() {
         // Only the active scorer or the system should be allowed to disable scoring.