Add METADATA to update_engine: Apache2+BSD = NOTICE am: 7d674af471 am: dfd32ca0b4 am: d5e56daaa2

Change-Id: I5f4636f96204cd2dc5c941b161560cc5230b379c
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..d97975c
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,3 @@
+third_party {
+  license_type: NOTICE
+}