Make essential Bazel packages publicly visible

This allows separate Bazel projects to reference Nomulus as an external
repository. They can then copy the []
directory structure into their own project and customize the Action
and Module lists for the GAE modules in their own deployment.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=136863886

java/google/registry/ui/BUILD

@@ -69,6 +69,7 @@ zip_file(
 java_library(
     name = "ui",
     srcs = glob(["*.java"]),
+    visibility = ["//visibility:public"],
     deps = [
         "//java/com/google/common/base",
         "//third_party/java/appengine:appengine-api",