Make sure we don't break pre-dexopting

Add art_standalone_dexpreopt_tests to our presubmits since we broke it
once without it being caught and it's relatively cheap.

(I'm not doing an import because I don't want to bring in all the ART
tests.)

Test: TH
Bug: 207474880
Change-Id: Ib9a738f5f77cc1aeb109f751a5e299b293804349
diff --git a/TEST_MAPPING b/TEST_MAPPING
index b07dc3b..87d8e39 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -11,6 +11,9 @@
     },
     {
       "name": "MicrodroidTestApp"
+    },
+    {
+      "name": "art_standalone_dexpreopt_tests"
     }
   ],
   "imports": [