Add support for dynamic dependencies and xcode.

This is required to enable mac sdk tests.

Change-Id: I9a3aedd9a92e773aadf83a2f934177b6e0195ecc
Bug: https://github.com/flutter/flutter/issues/65223
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/6320
Commit-Queue: Godofredo Contreras <godofredoc@google.com>
Reviewed-by: Keyong Han <keyonghan@google.com>