Bazel: Add fixes for --incompatible_load_java_rules_from_bzl

Change-Id: I5c37e69dd371c3e24a7981f632bd3e58741679d3

tools/BUILD

diff --git a/tools/BUILD b/tools/BUILD
index 9294fcf..4a9f11e 100644
--- a/tools/BUILD
+++ b/tools/BUILD
@@ -1,3 +1,4 @@
+load("@rules_java//java:defs.bzl", "java_package_configuration")
 load(
     "@bazel_tools//tools/jdk:default_java_toolchain.bzl",
     "JDK9_JVM_OPTS",