Add TEST_MAPPING.

Currently it triggers minadbd_test, recovery_unit_test and
recovery_component_test during presubmit.

Test: TreeHugger
Change-Id: Ie0e2ddc9519a7e9b66d059cdf0b81dcbba631c25
diff --git a/TEST_MAPPING b/TEST_MAPPING
new file mode 100644
index 0000000..a7c34dd
--- /dev/null
+++ b/TEST_MAPPING
@@ -0,0 +1,13 @@
+{
+  "presubmit": [
+    {
+      "name": "minadbd_test"
+    },
+    {
+      "name": "recovery_unit_test"
+    },
+    {
+      "name": "recovery_component_test"
+    }
+  ]
+}