Add gen_notice test.

Test: m cts dist reportmissinglicenses
Change-Id: I1d630c3d14d27b7605ab13d204d34b6851a24d33
diff --git a/android/Android.bp b/android/Android.bp
index 8eb55d2..65332b2 100644
--- a/android/Android.bp
+++ b/android/Android.bp
@@ -107,6 +107,7 @@
         "deptag_test.go",
         "expand_test.go",
         "fixture_test.go",
+        "gen_notice_test.go",
         "license_kind_test.go",
         "license_test.go",
         "licenses_test.go",