Adds ContentObserver for certificate downloaded notification

Adds ContentObserver to receive a notification everytime carrier network
certificate is downloaded.

Bug: 74090333
Test: manual test and unit tests
Change-Id: Ia8ac30ebbc8413d63a2b07b667ede056719e2bcd

2 files changed, 18 insertions, 2 deletions

diff --git a/service/java/com/android/server/wifi/CarrierNetworkConfig.java b/service/java/com/android/server/wifi/CarrierNetworkConfig.java
index db107bf6c..91e22afe1 100644
--- a/service/java/com/android/server/wifi/CarrierNetworkConfig.java
+++ b/service/java/com/android/server/wifi/CarrierNetworkConfig.java
@@ -16,12 +16,17 @@
 
 package com.android.server.wifi;
 
+import android.annotation.NonNull;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.database.ContentObserver;
+import android.net.Uri;
 import android.net.wifi.EAPConstants;
 import android.net.wifi.WifiEnterpriseConfig;
+import android.os.Handler;
+import android.os.Looper;
 import android.os.PersistableBundle;
 import android.telephony.CarrierConfigManager;
 import android.telephony.ImsiEncryptionInfo;
@@ -45,11 +50,13 @@ public class CarrierNetworkConfig {
     private static final int ENCODED_SSID_INDEX = 0;
     private static final int EAP_TYPE_INDEX = 1;
     private static final int CONFIG_ELEMENT_SIZE = 2;
+    private static final Uri CONTENT_URI = Uri.parse("content://carrier_information/carrier");
 
     private final Map<String, NetworkInfo> mCarrierNetworkMap;
     private boolean mIsCarrierImsiEncryptionInfoAvailable = false;
 
-    public CarrierNetworkConfig(Context context) {
+    public CarrierNetworkConfig(@NonNull Context context, @NonNull Looper looper,
+            @NonNull FrameworkFacade framework) {
         mCarrierNetworkMap = new HashMap<>();
         updateNetworkConfig(context);
 
@@ -62,6 +69,14 @@ public class CarrierNetworkConfig {
                 updateNetworkConfig(context);
             }
         }, filter);
+
+        framework.registerContentObserver(context, CONTENT_URI, false,
+                new ContentObserver(new Handler(looper)) {
+                @Override
+                public void onChange(boolean selfChange) {
+                    updateNetworkConfig(context);
+                }
+            });
     }
 
     /**
diff --git a/service/java/com/android/server/wifi/WifiInjector.java b/service/java/com/android/server/wifi/WifiInjector.java
index 4313ff4cf..ad7d78a04 100644
--- a/service/java/com/android/server/wifi/WifiInjector.java
+++ b/service/java/com/android/server/wifi/WifiInjector.java
@@ -167,13 +167,14 @@ public class WifiInjector {
         mBatteryStats = IBatteryStats.Stub.asInterface(mFrameworkFacade.getService(
                 BatteryStats.SERVICE_NAME));
         mWifiStateTracker = new WifiStateTracker(mBatteryStats);
-        mCarrierNetworkConfig = new CarrierNetworkConfig(mContext);
         // Now create and start handler threads
         mWifiServiceHandlerThread = new HandlerThread("WifiService");
         mWifiServiceHandlerThread.start();
         mWifiStateMachineHandlerThread = new HandlerThread("WifiStateMachine");
         mWifiStateMachineHandlerThread.start();
         Looper wifiStateMachineLooper = mWifiStateMachineHandlerThread.getLooper();
+        mCarrierNetworkConfig = new CarrierNetworkConfig(mContext,
+            mWifiServiceHandlerThread.getLooper(), mFrameworkFacade);
         WifiAwareMetrics awareMetrics = new WifiAwareMetrics(mClock);
         mWifiMetrics = new WifiMetrics(mClock, wifiStateMachineLooper, awareMetrics);
         // Modules interacting with Native.