On-device signing: Add TEST_MAPPING.

To run e2e tests.

Bug: 167516462
Test: atest
Change-Id: I35308f63723d3da12b67f595a565380effdc4f1c
diff --git a/ondevice-signing/TEST_MAPPING b/ondevice-signing/TEST_MAPPING
new file mode 100644
index 0000000..03b9b95
--- /dev/null
+++ b/ondevice-signing/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+    {
+      "name": "odsign_e2e_tests"
+    }
+  ]
+}