Bug 1415656 - Fix android serializing dateAdded as a string in sync bookmark records r=Grisha

MozReview-Commit-ID: 1u9DeVvYwjY

--HG--
extra : rebase_source : 24a16261ff037929dc424ddd1c278030a2d09f25

mobile/android/services/src/main/java/org/mozilla/gecko/sync/repositories/domain/BookmarkRecord.java

@@ -285,7 +285,7 @@ public class BookmarkRecord extends Record {
     // creation date. `created` is not a NOT NULL field in the bookmarks table. Either way, it pays
     // to be cautious here.
     if (this.dateAdded != null) {
-      putPayload(payload, "dateAdded", Long.toString(this.dateAdded));
+      payload.put("dateAdded", this.dateAdded);
     }
 
     if (isFolder()) {