plugin for native - metadata.lua, coronamanifest

I’m trying to use admob plugin for android - native project.
I copied the jar file to the project/android/app/libs folder,
but I don’t know what to do with metadata.lua

coronaManifest = {
dependencies = {
[“”] = “com.coronalabs”

What should I do with this one?
Where to modify?

I don’t know much knowledge about native builds but is this relevant?

I already read it several times, but it applies to only older versions(or at least several months before)
Download script doesn’t work now, so I have to download it manually(I did).
But I don’t know what to do with the metadata.lua files. especially dependency parts…