To implement Agora video call feature in native Android App

We are looking for a Native Android App developement team with min5 yrs. exp. in Firebase chat
and workied on implementing video call like QuickBlox, Agora etc.

We want to replace Quickblox video call with Agora video call as its not working as per our expectations.
Video call should work when the app is Active ( foreground, lock screen, unlock screen)and Inactive ( App in Background , Quit state, Lock screen, keeping the device Idle for more than 10 mins etc)

If you have worked on Firebase Chat and Video call then only apply Else please excuse us .

Thanks for understanding