[Kotlin Class ABI Jars] Failed to resolve public top level functions

Created by: tyvsmith

When consuming a third party dep that has a public top level function, it is not kept in the class abi jar. I've now seen this in a handful of jars as I've explored enabling on the Uber monorepo including

Repro steps:

1 )Set compile_against_abis=true in .buckconfig for Kotlin. 2) Add Square wire-runtime artifact or Android UAST jar as a prebuilt jar. 3) Add prebuilt jar as dependency 4) add import com.squareup.wire.internal.missingRequiredFields to kotlin file 5) Build

my_target/tester.kt:9:35 error: unresolved reference: missingRequiredFields
import com.squareup.wire.internal.missingRequiredFields
                                  ^

    When running <kotlinc>.
    When building rule //my_target:src_main.