Add license type: Apache+BSD are NOTICE licenses

Bug: 68860345
Bug: 69058154
Bug: 151953481

Test: no code changes
Change-Id: I60a93fc3cd28fd04801c7ebcbcbd95c8cb73a47b
diff --git a/METADATA b/METADATA
index c1ee686..deae2a4 100644
--- a/METADATA
+++ b/METADATA
@@ -10,6 +10,7 @@
     value: "https://github.com/etingof/pyasn1-modules"
   }
   version: "v0.2.8"
+  license_type: NOTICE
   last_upgrade_date {
     year: 2020
     month: 4