Check for a previous build upload in engine recipe.

Bug: https://github.com/flutter/flutter/issues/55082, https://github.com/flutter/flutter/issues/62146

Change-Id: I5088f72411af50102d77f71ae0c6e7fd6dbc2f07
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/4820
Reviewed-by: Godofredo Contreras <godofredoc@google.com>
Commit-Queue: Christopher Fujino <fujino@google.com>
45 files changed
tree: 87d6832d73bf47a4b50e705a07343cae30d93cb9
  1. infra/
  2. recipe_modules/
  3. recipes/
  4. .gitignore
  5. .style.yapf
  6. OWNERS
  7. recipes.py