Test Physical Web metadata serialization

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

Index: chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlInfo.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlInfo.java b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlInfo.java
index 5e0d791f212626408731e9a08d94d96f20b80a7a..d35d0c8e01410ec9f7c6037b090fb1251857c38c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlInfo.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlInfo.java
@@ -79,8 +79,8 @@ class UrlInfo implements Comparable<UrlInfo> {
     public static UrlInfo jsonDeserialize(JSONObject jsonObject) throws JSONException {
         return new UrlInfo(
                 jsonObject.getString(URL_KEY),
-                jsonObject.getDouble(SCAN_TIMESTAMP_KEY),
-                jsonObject.getLong(DISTANCE_KEY));
+                jsonObject.getDouble(DISTANCE_KEY),
+                jsonObject.getLong(SCAN_TIMESTAMP_KEY));
     }
 
     /**
@@ -143,6 +143,6 @@ class UrlInfo implements Comparable<UrlInfo> {
      */
     @Override
     public String toString() {
-        return String.format(Locale.getDefault(), "%s %f", mUrl, mDistance);
+        return String.format(Locale.getDefault(), "%s %f %d", mUrl, mDistance, mScanTimestamp);
     }
 }