LSC: Add `load()` statements for the builtin java rules

Loads are being added in preparation for moving the rules out of Blaze/Bazel and into the depot.

More information:[]

PiperOrigin-RevId: 617432685
Change-Id: I38f426871bf024892717741236a234b0d5765028

java/toolchains/BUILD

diff --git a/java/toolchains/BUILD b/java/toolchains/BUILD
index 0cc6644..894cf44 100644
--- a/java/toolchains/BUILD
+++ b/java/toolchains/BUILD
@@ -16,3 +16,11 @@
     visibility = ["//visibility:public"],
     deps = ["//java/private"],
 )
+
+filegroup(
+    name = "for_bazel_tests",
+    srcs = [
+        "BUILD",
+        "java_toolchain.bzl",
+    ],
+)