Android's cryptographic Development.

I have private android application for security researching, (please note) Payment will be done after confirm the complete of the project, you can check my history in project and this project would not take more than 7 days to complete, you can extended to 14 days maximum; otherwise you will lose the right for this project fees and will be forwarded to another fiverr user to complete it. This application i want to add the following and make sure the applications running with the following: - My application should contains Endless Foreground Service taken from; [login to view URL] -Communication parameters of latest version are abbreviated (latest update in android). -Google has released an update, the play protect is not disabled. but i need to add feature will be explain in details in private. You need to have Pefect knowledge how to develop and adding features in android .. it would be a plus if you could connect this application in our fresh VPS server and to make testing "private with our team" for proof complete the tasks.