Suppress expected exception due to missing network_watchlist.xml

Test: NULL
Bug:73264037
Change-Id: I640ad865fe85191f7d9e5fe887be10884c7bb801

services/core/java/com/android/server/net/watchlist/WatchlistConfig.java

@@ -107,6 +107,10 @@ class WatchlistConfig {
      * Reload watchlist by reading config file.
      */
     public void reloadConfig() {
+        if (!mXmlFile.exists()) {
+            // No config file
+            return;
+        }
         try (FileInputStream stream = new FileInputStream(mXmlFile)){
             final List<byte[]> crc32DomainList = new ArrayList<>();
             final List<byte[]> sha256DomainList = new ArrayList<>();

services/core/java/com/android/server/net/watchlist/WatchlistSettings.java

@@ -87,6 +87,10 @@ class WatchlistSettings {
     }
 
     public void reloadSettings() {
+        if (!mXmlFile.exists()) {
+            // No settings config
+            return;
+        }
         try (FileInputStream stream = mXmlFile.openRead()){
             XmlPullParser parser = Xml.newPullParser();
             parser.setInput(stream, StandardCharsets.UTF_8.name());
@@ -97,7 +101,7 @@ class WatchlistSettings {
                     mPrivacySecretKey = parseSecretKey(parser);
                 }
             }
-            Log.i(TAG, "Reload watchlist settings done");
+            Slog.i(TAG, "Reload watchlist settings done");
         } catch (IllegalStateException | NullPointerException | NumberFormatException |
                 XmlPullParserException | IOException | IndexOutOfBoundsException e) {
             Slog.e(TAG, "Failed parsing xml", e);