When validation state changes, update the AP summary.

This stops the AP summary from getting stuck on "Connected, no
Internet" even when the system has validated Internet access.

Bug: 62209358
Test: make -j64 RunSettingsRoboTests
Change-Id: I235404408f7d8b958653d25656d97da8206e35ce

src/com/android/settings/wifi/details/WifiDetailPreferenceController.java

@@ -16,6 +16,7 @@
 package com.android.settings.wifi.details;
 
 import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
 
 import android.app.Fragment;
@@ -165,9 +166,24 @@ public class WifiDetailPreferenceController extends PreferenceController impleme
             }
         }
 
+        private boolean hasCapabilityChanged(NetworkCapabilities nc, int cap) {
+            // If this is the first time we get NetworkCapabilities, report that something changed.
+            if (mNetworkCapabilities == null) return true;
+
+            // nc can never be null, see ConnectivityService#callCallbackForRequest.
+            return mNetworkCapabilities.hasCapability(cap) != nc.hasCapability(cap);
+        }
+
         @Override
         public void onCapabilitiesChanged(Network network, NetworkCapabilities nc) {
+            // If the network just validated or lost Internet access, refresh network state.
+            // Don't do this on every NetworkCapabilities change because refreshNetworkState
+            // sends IPCs to the system server from the UI thread, which can cause jank.
             if (network.equals(mNetwork) && !nc.equals(mNetworkCapabilities)) {
+                if (hasCapabilityChanged(nc, NET_CAPABILITY_VALIDATED) ||
+                        hasCapabilityChanged(nc, NET_CAPABILITY_CAPTIVE_PORTAL)) {
+                    refreshNetworkState();
+                }
                 mNetworkCapabilities = nc;
                 updateIpLayerInfo();
             }

tests/robotests/src/com/android/settings/wifi/details/WifiDetailPreferenceControllerTest.java

@@ -518,6 +518,45 @@ public class WifiDetailPreferenceControllerTest {
         inOrder.verify(mockDnsPref).setVisible(true);
     }
 
+    @Test
+    public void onCapabilitiesChanged_callsRefreshIfNecessary() {
+        NetworkCapabilities nc = makeNetworkCapabilities();
+        when(mockConnectivityManager.getNetworkCapabilities(mockNetwork))
+                .thenReturn(new NetworkCapabilities(nc));
+
+        String summary = "Connected, no Internet";
+        when(mockAccessPoint.getSettingsSummary()).thenReturn(summary);
+
+        InOrder inOrder = inOrder(mockConnectionDetailPref);
+        mController.displayPreference(mockScreen);
+        mController.onResume();
+        inOrder.verify(mockConnectionDetailPref).setTitle(summary);
+
+        // Check that an irrelevant capability update does not update the access point summary, as
+        // doing so could cause unnecessary jank...
+        summary = "Connected";
+        when(mockAccessPoint.getSettingsSummary()).thenReturn(summary);
+        updateNetworkCapabilities(nc);
+        inOrder.verify(mockConnectionDetailPref, never()).setTitle(any());
+
+        // ... but that if the network validates, then we do refresh.
+        nc.addCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED);
+        updateNetworkCapabilities(nc);
+        inOrder.verify(mockConnectionDetailPref).setTitle(summary);
+
+        summary = "Connected, no Internet";
+        when(mockAccessPoint.getSettingsSummary()).thenReturn(summary);
+
+        // Another irrelevant update won't cause the UI to refresh...
+        updateNetworkCapabilities(nc);
+        inOrder.verify(mockConnectionDetailPref, never()).setTitle(any());
+
+        // ... but if the network is no longer validated, then we display "connected, no Internet".
+        nc.removeCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED);
+        updateNetworkCapabilities(nc);
+        inOrder.verify(mockConnectionDetailPref).setTitle(summary);
+    }
+
     @Test
     public void canForgetNetwork_noNetwork() {
         when(mockAccessPoint.getConfig()).thenReturn(null);