Make JarHelper public

PiperOrigin-RevId: 318937758
diff --git a/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/BUILD b/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/BUILD
index 1ed2516..1e3dd49 100644
--- a/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/BUILD
+++ b/src/java_tools/buildjar/java/com/google/devtools/build/buildjar/BUILD
@@ -62,10 +62,7 @@
 alias(
     name = "jarhelper",
     actual = "//src/java_tools/buildjar/java/com/google/devtools/build/buildjar/jarhelper",
-    visibility = [
-        "//src/java_tools/buildjar:buildjar_package_group",
-        "//src/tools/android:__subpackages__",
-    ],
+    visibility = ["//visibility:public"],
 )
 
 # Bazel's BuildJar