Add TEST_MAPPING for api specifications

Changes to the api directory will run the tests which make use of the
API specification.

Bug: 123254057
Test: atest
Change-Id: I56e207cd40e8aade9bff3de094240ce457b9a403
diff --git a/api/TEST_MAPPING b/api/TEST_MAPPING
new file mode 100644
index 0000000..19faf86
--- /dev/null
+++ b/api/TEST_MAPPING
@@ -0,0 +1,13 @@
+{
+  "presubmit": [
+    {
+      "name": "CtsApacheHttpLegacy27ApiSignatureTestCases"
+    },
+    {
+      "name": "CtsApacheHttpLegacyCurrentApiSignatureTestCases"
+    },
+    {
+      "name": "CtsApacheHttpLegacyUsesLibraryApiSignatureTestCases"
+    }
+  ]
+}