Clear settings in Physical Web test setup

chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java
index a71d7d83eedd6715a08f74873322d2c72d6b6a98..e8b4f494fe124acd8a7c0b4c183fc47bc0bd5c5a 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java
@@ -484,4 +484,14 @@ class UrlManager {
             NotificationManagerProxy notificationManager) {
         mNotificationManager = notificationManager;
     }
+
+    @VisibleForTesting
+    static void clearPrefsForTesting(Context context) {
+        PreferenceManager.getDefaultSharedPreferences(context).edit()
+                .remove(PREFS_VERSION_KEY)
+                .remove(PREFS_NEARBY_URLS_KEY)
+                .remove(PREFS_RESOLVED_URLS_KEY)
+                .remove(PREFS_NOTIFICATION_UPDATE_TIMESTAMP)
+                .apply();
+    }
 }