authfs: add AuthFsTestCases to presubmit

Bug: 178874539
Test: atest
Change-Id: I818c469722dbf117c374c0b29784aef3aa747647
diff --git a/authfs/TEST_MAPPING b/authfs/TEST_MAPPING
index d0c0b09..d2dc1d8 100644
--- a/authfs/TEST_MAPPING
+++ b/authfs/TEST_MAPPING
@@ -2,6 +2,9 @@
   "presubmit": [
     {
       "name": "authfs_device_test_src_lib"
+    },
+    {
+      "name": "AuthFsTestCases"
     }
   ]
 }