Direct notification of network interface changes.

Connectivity broadcasts recently changed and are no longer sent for
certain types of network changes.  For example, when stacked network
interfaces change for a mobile network.  To ensure that we pick up
all these details, directly wire the two services together.

Also remove some unused code for split network types.

Bug: 18666753
Change-Id: I0467bd5b330c0e0cb51af2306d821b41ad16337a
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index dde158c..a86d564 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -231,6 +231,7 @@
     private static ConnectivityService sServiceInstance;
 
     private INetworkManagementService mNetd;
+    private INetworkStatsService mStatsService;
     private INetworkPolicyManager mPolicyManager;
 
     private String mCurrentTcpBufferSizes;
@@ -630,6 +631,7 @@
 
         mContext = checkNotNull(context, "missing Context");
         mNetd = checkNotNull(netManager, "missing INetworkManagementService");
+        mStatsService = checkNotNull(statsService, "missing INetworkStatsService");
         mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager");
         mKeyStore = KeyStore.getInstance();
         mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
@@ -2166,6 +2168,7 @@
             if (isDefaultNetwork(nai)) {
                 mDefaultInetConditionPublished = 0;
             }
+            notifyIfacesChanged();
             notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST);
             nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED);
             mNetworkAgentInfos.remove(msg.replyTo);
@@ -3660,6 +3663,7 @@
         if (isDefaultNetwork(networkAgent)) handleApplyDefaultProxy(newLp.getHttpProxy());
         // TODO - move this check to cover the whole function
         if (!Objects.equals(newLp, oldLp)) {
+            notifyIfacesChanged();
             notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED);
         }
     }
@@ -4250,6 +4254,7 @@
             }
             networkAgent.created = true;
             updateLinkProperties(networkAgent, null);
+            notifyIfacesChanged();
             notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK);
             networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED);
             if (networkAgent.isVPN()) {
@@ -4393,6 +4398,16 @@
         return "UNKNOWN";
     }
 
+    /**
+     * Notify other system services that set of active ifaces has changed.
+     */
+    private void notifyIfacesChanged() {
+        try {
+            mStatsService.forceUpdateIfaces();
+        } catch (Exception ignored) {
+        }
+    }
+
     @Override
     public boolean addVpnAddress(String address, int prefixLength) {
         throwIfLockdownEnabled();