TEST_MAPPING: test dependers of this crate

Bug: 168167373
Test: TH
Change-Id: Ie4359cf969e02b7ac497f20c92d4f0fbe666cd6d
diff --git a/TEST_MAPPING b/TEST_MAPPING
new file mode 100644
index 0000000..d64ac43
--- /dev/null
+++ b/TEST_MAPPING
@@ -0,0 +1,9 @@
+// Generated by cargo2android.py for tests in Android.bp
+{
+  "presubmit": [
+    {
+      "host": true,
+      "name": "tokio-macros_host_test_src_lib"
+    }
+  ]
+}