Add ConnectivityManager.getNetworkWatchlistConfigHash()

Apps can use this API to get network watchlist config hash for auditing.

Bug: 63908748
Test: Able to compile
Change-Id: I5ce9e6bb6dad88139c0a102da58be0dd7c284b7a

core/java/android/net/ConnectivityManager.java

@@ -3763,4 +3763,20 @@ public class ConnectivityManager {
             throw e.rethrowFromSystemServer();
         }
     }
+
+    /**
+     * The network watchlist is a list of domains and IP addresses that are associated with
+     * potentially harmful apps. This method returns the hash of the watchlist currently
+     * used by the system.
+     *
+     * @return Hash of network watchlist config file. Null if config does not exist.
+     */
+    public byte[] getNetworkWatchlistConfigHash() {
+        try {
+            return mService.getNetworkWatchlistConfigHash();
+        } catch (RemoteException e) {
+            Log.e(TAG, "Unable to get watchlist config hash");
+            throw e.rethrowFromSystemServer();
+        }
+    }
 }

core/java/android/net/IConnectivityManager.aidl

@@ -180,4 +180,6 @@ interface IConnectivityManager
     void stopKeepalive(in Network network, int slot);
 
     String getCaptivePortalServerUrl();
+
+    byte[] getNetworkWatchlistConfigHash();
 }

core/java/android/net/NetworkWatchlistManager.java

@@ -86,4 +86,16 @@ public class NetworkWatchlistManager {
             e.rethrowFromSystemServer();
         }
     }
+
+    /**
+     * Get Network Watchlist config file hash.
+     */
+    public byte[] getWatchlistConfigHash() {
+        try {
+            return mNetworkWatchlistManager.getWatchlistConfigHash();
+        } catch (RemoteException e) {
+            Log.e(TAG, "Unable to get watchlist config hash");
+            throw e.rethrowFromSystemServer();
+        }
+    }
 }