APK splits should result in smaller intermediate library.ap_ outputs

AndroidResourceLink actions don't seem to be affected by APK splits.

if I have

android_binary(
name = "foo",
densities = ["hdpi"],
resource_configuration_filters = ["en"],
deps = [:library_with_resources])

android_library(
name = "library_with_resources"
resource_file = [...])

I'd expect the `AndroidResourceLink` action to honor the filters applied in the binary and produce more minimal outputs but with or without those restrictions the library.ap_ outputs are the same.

Is this by design for some reason I'm missing or is this a good optimization case?

Background: A large amount of our downloads come from large intermediate outputs from AndroidResourceLink.

I suspect https://github.com/bazelbuild/rules_android/issues/10 would help with this too.