Update TEST_MAPPING am: fa4b6b3a8a

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/structopt-derive/+/2108609

Change-Id: I625c249415b5bad642d2b94ea6f3a9f374f7f38a
Signed-off-by: Automerger Merge Worker <[email protected]>
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 8029a19..222631c 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -5,6 +5,11 @@
       "path": "external/rust/crates/base64"
     }
   ],
+  "postsubmit": [
+    {
+      "name": "authfs_device_test_src_lib"
+    }
+  ],
   "presubmit": [
     {
       "name": "authfs_device_test_src_lib"