lib: define FormData and fetch etc. in the built-in snapshot
Now that --experimental-fetch is true by default, define the dependent interfaces in the built-in snapshot and only delete them at run time when --no-experimental-fetch is set.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Now that --experimental-fetch is true by default, define the dependent interfaces in the built-in snapshot and only delete them at run time when --no-experimental-fetch is set.