Fix typo breaking postprocess and add more types (#4404)

src/clusterfuzz/_internal/base/tasks/__init__.py

@@ -281,7 +281,7 @@ def is_done_collecting_messages():
 def get_postprocess_task():
   """Gets a postprocess task if one exists."""
   # This should only be run on non-preemptible bots.
-  if not (task_utils.is_remotely_executing_utasks() and
+  if not (task_utils.is_remotely_executing_utasks() or
           task_utils.get_opted_in_tasks()):
     return None
   # Postprocess is platform-agnostic, so we run all such tasks on our

src/clusterfuzz/_internal/base/tasks/task_utils.py

@@ -34,14 +34,14 @@ def is_remotely_executing_utasks(task=None) -> bool:
     return True
   if task is None:
     return False
-  return is_task_opted_into_uworker_execution(task)
+  return bool(is_task_opted_into_uworker_execution(task))
 
 
-def get_opted_in_tasks():
+def get_opted_in_tasks() -> List[str]:
   return local_config.ProjectConfig().get('uworker_tasks', [])
 
 
-def is_task_opted_into_uworker_execution(task):
+def is_task_opted_into_uworker_execution(task: str) -> bool:
   # TODO(metzman): Remove this after OSS-Fuzz and Chrome are at parity.
   uworker_tasks = get_opted_in_tasks()
   return task in uworker_tasks