Firebase and Jitsit Meet

Hi everyone! I am trying to use firebase in jitsi-meet project. But I got some errors
Ensure you have:

1) imported the 'io.invertase.firebase.app.ReactNativeFirebaseAppPackage' module in your 'MainApplication.java' file.

2) Added the 'new ReactNativeFirebaseAppPackage()' line inside of the RN 'getPackages()' method list.

See http://invertase.link/android for full setup instructions.

but in jitsi-meet project don’t have file MainApplication.java, so I’m trying to add in MainActivity.java. But it didn’t work. Has anyone succeeded in adding firebase in jitsi-meet ? Any help would be appreciate.