After digging around for a while, I could only find those two libraries you mentioned so
I looked at some of the most recent forks on the java-apns GitHub page and the most recent one I could find was done by a user under the name "froh42". His fork is located here [dead]. The latest commit was 4 days ago, but I'm not sure if this person is actually adding to the repo's core functionality or not since it's very late and I'm too tired to check.
My suggestion would be, if you're going to use java-apns, to look at froh's repo and see if it checks out or not. If it doesn't, you can view the list of forks from the original java-apns repo here. Sorry I couldn't be of more help to you and good luck!
Note: Do not use any of your libraries since those are based on the Binary Provider API which will stop working from Nov. 2020!