Fix license_type. Contains MPL in certificate source

See: http://go/android-license-checking-v2-lsc

https://android.googlesource.com/platform/external/grpc-grpc/+/master/etc/roots.pem

https://android.googlesource.com/platform/external/grpc-grpc/+/master/src/android/test/interop/app/src/main/assets/roots.pem

Test: m all

Bug: 151953481
Bug: 151177513
Bug: 67772237
Change-Id: Icfea2c086763ada93bf987980204776bb2e4f953
diff --git a/METADATA b/METADATA
index d97975c..240084e 100644
--- a/METADATA
+++ b/METADATA
@@ -1,3 +1,6 @@
 third_party {
-  license_type: NOTICE
+  # would be NOTICE save for MPL 2.0 in:
+  #   etc/roots.pem
+  #   src/android/test/interop/app/src/main/assets/roots.pem
+  license_type: RECIPROCAL
 }