Add license type: Apache2 is a NOTICE license am: 7ec1289084 am: 362cdb1e95

Change-Id: I534e47a2a081a5fbbb3010c2150336acee3b6d14
diff --git a/METADATA b/METADATA
index 010701d..521ada3 100644
--- a/METADATA
+++ b/METADATA
@@ -10,6 +10,7 @@
     value: "https://github.com/google/guice/archive/4.2.tar.gz"
   }
   version: "4.2"
+  license_type: NOTICE
   last_upgrade_date {
     year: 2018
     month: 8