Add METADATA to apps/Contacts: Apache2+BSD+CC-BY

All add up to NOTICE

Bug: 68860345
Bug: 69058154
Bug: 151953481

Test: no code changes
Change-Id: Ic00681f199aae5628e71e8d63010d0c281a5778d
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
+}