Bazel: Add fixes for --incompatible_load_java_rules_from_bzl

Change-Id: I211a2aa170df98146d60f9dcbab8a0cf5aea48bc
diff --git a/BUILD b/BUILD
index 46614fd..1bd2924 100644
--- a/BUILD
+++ b/BUILD
@@ -1,3 +1,4 @@
+load("@rules_java//java:defs.bzl", "java_library")
 load("//tools/bzl:junit.bzl", "junit_tests")
 load("//tools/bzl:plugin.bzl", "PLUGIN_DEPS", "PLUGIN_TEST_DEPS", "gerrit_plugin")