Fix up @build_tools//tools/java package

https://github.com/bazelbuild/bazel/pull/12994 added the file, but it's
currently exposed as:
`@build_tools//tools:java/java_stub_template.txt`

This fixes it up to be properly exposed as:
`@build_tools//tools/java:java_stub_template.txt`

Which makes more sense :)

Closes #13790.

PiperOrigin-RevId: 388677326
diff --git a/tools/java/BUILD b/tools/java/BUILD
index 5ad6d6f..62d9c3e 100644
--- a/tools/java/BUILD
+++ b/tools/java/BUILD
@@ -4,6 +4,7 @@
     name = "srcs",
     srcs = [
         "BUILD",
+        "BUILD.tools",
         "//tools/java/runfiles:srcs",
     ],
     visibility = ["//tools:__pkg__"],
@@ -21,6 +22,10 @@
 
 filegroup(
     name = "embedded_tools",
-    srcs = ["//tools/java/runfiles:embedded_tools"],
+    srcs = [
+        "BUILD.tools",
+        ":java_stub_template.txt",
+        "//tools/java/runfiles:embedded_tools",
+    ],
     visibility = ["//tools:__pkg__"],
 )
diff --git a/tools/java/BUILD.tools b/tools/java/BUILD.tools
new file mode 100644
index 0000000..8645079
--- /dev/null
+++ b/tools/java/BUILD.tools
@@ -0,0 +1 @@
+exports_files(["java_stub_template.txt"])