LPS-48069 SF
LPS-49309 Send user details along with push notification
LPS-49309 Extracting constants for JSON keys. These constatns should be in *-service.jar because they need to be publicly available.
LPS-49309 Adding remote method that accepts single toUserId. It's not needed yet, just for the sake of completeness.
LPS-49309 Sort
LPS-49309 Regen