Google Play Services & Google Firebase .jar files
After the google play services update version 30, the google-play-services.jar is missing from the Android SDK folder and a few .aar files have taken its position.
Ths Github repository has all the .jar files based on the .aar files of the latest Google Play Services and Google Firebase SDK you can find in the <AndroidSDK>\extras\google\m2repository\com\google\firebase and <AndroidSDK>\extras\google\m2repository\com\google\android\gms
Google Play Services Version
Find the correct <integer name="google_play_services_version">value</integer> bellow
10.0.1 --> 10084000