In that project, I have created Firebase Remote Config example app. We were create few parameter on firebase remote and try to access in our projects.
In that sample app we try to build intro slider in an android, we used ViewPager, TabLayout for that.
I app contains auto read OTP in android with the help of SMS User Consent API
That android app can you send the device to device notifications without server in Android.
That example app contains firebase cloud messaging implementation, you can download sample here.
This sample app contains navigation architecture component end to end integration.