我有工作，但我不开心的解决方案。在LIB B，我不得不添加一个com.example.library.A包并拷贝文件Foo.aidl到它。

I have it working, but I'm not happy with the solution. In lib B, I had to add a com.example.library.A package and copy the Foo.aidl file into it.