// common module
interface Brand {
    val foo: String // plus lots more properties and funs

    // implement Brand so usage like Brand.foo instead of Brand.INSTANCE.foo
    companion object : Brand {
        // this must be set very early in Application.onCreate()
        // why not use DI? Because sometimes we need access to Brand before DI has finished setting up
        lateinit var INSTANCE: Brand

        override val foo: String
            get() = INSTANCE.foo
    }
}
    
// brand module (dependency on common module)
// different brand modules for different product flavors
object ActualBrand : Brand {
    override val foo: String
        get() = "actual brand"
}

fun Brand.Companion.init() {
    INSTANCE = ActualBrand
}

// app module (dependencies on brand and common modules)
class MyApplication : Application() {
    override fun onCreate() {
        super.onCreate()
        Brand.init() // note: we do not need to hardcode ActualBrand
        // proceed to DI initialisation
    }
}

Application

Application.onCreate()

ContentProvider