Explicitly replace "import tensorflow" with "tensorflow.compat.v1" for TF2.x migration
Explicitly replace "import tensorflow" with "tensorflow.compat.v1" for TF2.x migration

PiperOrigin-RevId: 293794611
Change-Id: Ie572fd681e607d18ba3c92cdf9c4e1d41f0b2b8b

deepmind/open_spiel,deepmind/open_spiel,deepmind/open_spiel,deepmind/open_spiel,deepmind/open_spiel,deepmind/open_spiel