Introduce an overlay for actively preferring bad wifi.

This correctly updates when the mcc/mnc change.

Test: MultinetworkPolicyTrackerTest
Change-Id: I11c7ea7074a15975fb68d39eb3c728778d84a516
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 93265e5..cb209e8 100755
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -783,7 +783,8 @@
     final ConnectivityDiagnosticsHandler mConnectivityDiagnosticsHandler;
 
     private final DnsManager mDnsManager;
-    private final NetworkRanker mNetworkRanker;
+    @VisibleForTesting
+    final NetworkRanker mNetworkRanker;
 
     private boolean mSystemReady;
     private Intent mInitialBroadcast;
@@ -1417,7 +1418,6 @@
                 new RequestInfoPerUidCounter(MAX_NETWORK_REQUESTS_PER_SYSTEM_UID - 1);
 
         mMetricsLog = logger;
-        mNetworkRanker = new NetworkRanker();
         final NetworkRequest defaultInternetRequest = createDefaultRequest();
         mDefaultRequest = new NetworkRequestInfo(
                 Process.myUid(), defaultInternetRequest, null,
@@ -1538,6 +1538,9 @@
 
         mMultinetworkPolicyTracker = mDeps.makeMultinetworkPolicyTracker(
                 mContext, mHandler, () -> updateAvoidBadWifi());
+        mNetworkRanker =
+                new NetworkRanker(new NetworkRanker.Configuration(activelyPreferBadWifi()));
+
         mMultinetworkPolicyTracker.start();
 
         mDnsManager = new DnsManager(mContext, mDnsResolver);
@@ -5050,6 +5053,10 @@
         return mMultinetworkPolicyTracker.getAvoidBadWifi();
     }
 
+    private boolean activelyPreferBadWifi() {
+        return mMultinetworkPolicyTracker.getActivelyPreferBadWifi();
+    }
+
     /**
      * Return whether the device should maintain continuous, working connectivity by switching away
      * from WiFi networks having no connectivity.
@@ -5073,6 +5080,7 @@
         for (final NetworkOfferInfo noi : offersToUpdate) {
             updateOfferScore(noi.offer);
         }
+        mNetworkRanker.setConfiguration(new NetworkRanker.Configuration(activelyPreferBadWifi()));
         rematchAllNetworksAndRequests();
     }
 
@@ -5088,6 +5096,7 @@
         pw.println("Bad Wi-Fi avoidance: " + avoidBadWifi());
         pw.increaseIndent();
         pw.println("Config restrict:   " + configRestrict);
+        pw.println("Actively prefer:   " + activelyPreferBadWifi());
 
         final String value = mMultinetworkPolicyTracker.getAvoidBadWifiSetting();
         String description;