Fix the directory of apkdmverity and add TEST_MAPPING

It was in the wrong directory: apkdmverity/apkverity. Changed it to
directly under apkdmverity.

Bug: N/A
Test: monitor TH
Change-Id: I47599ba5f2b4fb237c21a5ddc63fb3ce0bcf7349
diff --git a/apkdmverity/TEST_MAPPING b/apkdmverity/TEST_MAPPING
new file mode 100644
index 0000000..997b3f9
--- /dev/null
+++ b/apkdmverity/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "postsubmit" : [
+    {
+      "name" : "apkdmverity.test"
+    }
+  ]
+}