Symlink to rules_java in soong integration test.

Bug: 292023656
Test: CI + ABTD
Change-Id: I3ac87154c2d77cb18c7ba60f638b5787cef57606
diff --git a/tests/lib.sh b/tests/lib.sh
index 4aaf272..40b317b 100644
--- a/tests/lib.sh
+++ b/tests/lib.sh
@@ -147,6 +147,7 @@
   symlink_directory external/bazelbuild-rules_go
   symlink_directory external/bazelbuild-rules_license
   symlink_directory external/bazelbuild-kotlin-rules
+  symlink_directory external/bazelbuild-rules_java
 
   symlink_file WORKSPACE
   symlink_file BUILD