chore: replace module import for BaseAgent in local_eval_service

PiperOrigin-RevId: 789136339

Author: Poggecci

src/google/adk/evaluation/local_eval_service.py

@@ -24,7 +24,7 @@
 
 from typing_extensions import override
 
-from ..agents import BaseAgent
+from ..agents.base_agent import BaseAgent
 from ..artifacts.base_artifact_service import BaseArtifactService
 from ..artifacts.in_memory_artifact_service import InMemoryArtifactService
 from ..errors.not_found_error import NotFoundError