Add license rules

PiperOrigin-RevId: 518370510

rust/BUILD

@@ -5,7 +5,10 @@ load("//third_party/bazel_skylib/rules:common_settings.bzl", "string_flag")
 
 load("@rules_proto//proto:defs.bzl", "proto_lang_toolchain")
 
-package(default_visibility = ["//src/google/protobuf:__subpackages__"])
+package(
+    default_applicable_licenses = ["//third_party/protobuf:license"],
+    default_visibility = ["//src/google/protobuf:__subpackages__"],
+)
 
 rust_library(
     name = "protobuf",

rust/cpp_kernel/BUILD

@@ -2,6 +2,8 @@
 
 load("@rules_rust//rust:defs.bzl", "rust_library", "rust_test")
 
+package(default_applicable_licenses = ["//third_party/protobuf:license"])
+
 rust_library(
     name = "cpp",
     srcs = ["cpp.rs"],

rust/test/BUILD

@@ -1,6 +1,8 @@
 load("//rust:defs.bzl", "rust_proto_library")
 load("@rules_rust//rust:defs.bzl", "rust_test")
 
+package(default_applicable_licenses = ["//third_party/protobuf:license"])
+
 rust_proto_library(
     name = "unittest_rust_proto",
     testonly = True,

rust/test/rust_proto_library_unit_test/BUILD

@@ -1,3 +1,5 @@
 load(":rust_proto_library_unit_test.bzl", "rust_proto_library_unit_test")
 
+package(default_applicable_licenses = ["//third_party/protobuf:license"])
+
 rust_proto_library_unit_test(name = "rust_proto_library_unit_test")

rust/upb_kernel/BUILD

@@ -2,6 +2,8 @@
 
 load("@rules_rust//rust:defs.bzl", "rust_library", "rust_test")
 
+package(default_applicable_licenses = ["//third_party/protobuf:license"])
+
 rust_library(
     name = "upb",
     srcs = ["upb.rs"],