Functional tests for lights hal.

Bug: 32022457
Test: light_hidl_hal_test
Change-Id: I28650ec69349dda82217e8db1b954a507cc264e5
diff --git a/light/Android.bp b/light/Android.bp
index c12cd4f..8d2c986 100644
--- a/light/Android.bp
+++ b/light/Android.bp
@@ -1,4 +1,5 @@
 // This is an autogenerated file, do not edit.
 subdirs = [
     "2.0",
+    "2.0/vts/functional",
 ]