Fix TFF project format.

tensorflow_federated/python/common_libs/tracing_test.py

tensorflow_federated/python/core/api/intrinsics_test.py

tensorflow_federated/python/core/impl/ast_generation_test.py

...hon/core/impl/compiler/compiled_computation_transforms.py

tensorflow_federated/python/core/impl/compiler/test_utils.py

...ow_federated/python/core/impl/compiler/transformations.py

...federated/python/core/impl/executors/eager_tf_executor.py

...w_federated/python/core/impl/executors/executor_stacks.py

.../core/impl/executors/federated_resolving_strategy_test.py

...ython/core/impl/executors/reference_resolving_executor.py

...w_federated/python/core/impl/executors/remote_executor.py

...erated/python/core/impl/executors/remote_executor_test.py

...erated/python/core/impl/executors/sizing_executor_test.py

...ated/python/core/impl/federated_computation_utils_test.py

tensorflow_federated/python/core/impl/reference_executor.py

tensorflow_federated/python/core/impl/types/type_analysis.py

...orflow_federated/python/core/impl/utils/function_utils.py

tensorflow_federated/python/core/utils/encoding_utils.py

...orflow_federated/python/core/utils/encoding_utils_test.py

...thon/examples/remote_execution/remote_executor_example.py