fix releasetools_test

Some test cases are failing because tests are not updated accordinly.

Bug: n/a
Test: atest releasetools_test
Change-Id: I3df071f72f01dedd6df4fa462ca52b8a0b1ffd4e
diff --git a/tools/releasetools/test_sign_apex.py b/tools/releasetools/test_sign_apex.py
index 646b04d..8470f20 100644
--- a/tools/releasetools/test_sign_apex.py
+++ b/tools/releasetools/test_sign_apex.py
@@ -69,5 +69,5 @@
         payload_key,
         container_key,
         False,
-        codename_to_api_level_map={'S': 31})
+        codename_to_api_level_map={'S': 31, 'Tiramisu' : 32})
     self.assertTrue(os.path.exists(signed_apex))