Fixes usage of tf.app in official model repos.

PiperOrigin-RevId: 308369201

official/recommendation/movielens.py

@@ -31,7 +31,7 @@ import numpy as np
 import pandas as pd
 import six
 from six.moves import urllib  # pylint: disable=redefined-builtin
-from absl import app as absl_app
+from absl import app
 from absl import flags
 from absl import logging
 import tensorflow as tf
@@ -40,7 +40,6 @@ import tensorflow as tf
 from official.utils.flags import core as flags_core
 
 
-
 ML_1M = "ml-1m"
 ML_20M = "ml-20m"
 DATASETS = [ML_1M, ML_20M]
@@ -306,4 +305,4 @@ def main(_):
 if __name__ == "__main__":
   define_data_download_flags()
   FLAGS = flags.FLAGS
-  absl_app.run(main)
+  app.run(main)