Bazel: Add fixes for --incompatible_load_{java|proto}_rules_from_bzl

Change-Id: I2e5cc1e6a11f7321ad9fd408b5e9223fd1f7764e
diff --git a/java/com/google/gerrit/plugins/checks/acceptance/BUILD b/java/com/google/gerrit/plugins/checks/acceptance/BUILD
index 6a1d023..bea0c25 100644
--- a/java/com/google/gerrit/plugins/checks/acceptance/BUILD
+++ b/java/com/google/gerrit/plugins/checks/acceptance/BUILD
@@ -1,3 +1,5 @@
+load("@rules_java//java:defs.bzl", "java_library")
+
 package(
     default_testonly = True,
     default_visibility = ["//plugins/checks:visibility"],
diff --git a/java/com/google/gerrit/plugins/checks/acceptance/testsuite/BUILD b/java/com/google/gerrit/plugins/checks/acceptance/testsuite/BUILD
index 577bfd4..203bab6 100644
--- a/java/com/google/gerrit/plugins/checks/acceptance/testsuite/BUILD
+++ b/java/com/google/gerrit/plugins/checks/acceptance/testsuite/BUILD
@@ -1,3 +1,5 @@
+load("@rules_java//java:defs.bzl", "java_library")
+
 package(
     default_testonly = True,
     default_visibility = ["//plugins/checks:visibility"],
diff --git a/java/com/google/gerrit/plugins/checks/testing/BUILD b/java/com/google/gerrit/plugins/checks/testing/BUILD
index 6e4e2b7..0f67a93 100644
--- a/java/com/google/gerrit/plugins/checks/testing/BUILD
+++ b/java/com/google/gerrit/plugins/checks/testing/BUILD
@@ -1,3 +1,5 @@
+load("@rules_java//java:defs.bzl", "java_library")
+
 package(
     default_testonly = True,
     default_visibility = ["//plugins/checks:visibility"],
diff --git a/proto/BUILD b/proto/BUILD
index 6e3b839..168ca6f 100644
--- a/proto/BUILD
+++ b/proto/BUILD
@@ -1,3 +1,6 @@
+load("@rules_proto//proto:defs.bzl", "proto_library")
+load("@rules_java//java:defs.bzl", "java_proto_library")
+
 package(default_visibility = ["//plugins/checks:visibility"])
 
 proto_library(