Bazel: Add fixes for --incompatible_load_java_rules_from_bzl

Change-Id: Ida37b977707671b59484d83a2accb448f55c0a36

BUILD

diff --git a/BUILD b/BUILD
index adf25b4..92a7ebb 100644
--- a/BUILD
+++ b/BUILD
@@ -1,3 +1,4 @@
+load("@rules_java//java:defs.bzl", "java_library")
 load(
     "//tools/bzl:plugin.bzl",
     "PLUGIN_DEPS",