Include more tests in presubmits

Configure avf_backcompat_tests and old_images_avf_test as presubmits.

Bug: N/A
Change-Id: I0bba916b093839bf5e99d366a2f7655279ca210b
Test: T/H
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 8cb01d7..5dd060a 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -49,6 +49,12 @@
     },
     {
       "name": "vm_accessor_test"
+    },
+    {
+      "name": "avf_backcompat_tests"
+    },
+    {
+      "name": "old_images_avf_test"
     }
   ],
   "avf-postsubmit": [