Since I819954da56 JUnit test is added that depends on reviewdb_proto,
however, this new dependency wasn't added to Eclipse classpath
generation machinery. Widen the visibility of that library and add
it to the transitive closure of Eclipse classpath generation.
Ad a side effect, we need to conditionally query compilation_info
attribute during classpath generation, because java_proto_library
doesn't expose this attribute.
Bug: Issue 9564
Change-Id: I4ef1be9b1f7db9764f6bc8e5571da6ba6ac211f6
3ed0112115