Next frame stochastic discrete tuning grid.

def next_frame_stochastic_discrete_range(rhp):
  """Next frame stochastic discrete tuning grid."""
  rhp.set_float("learning_rate_constant", 0.001, 0.01)
  rhp.set_float("dropout", 0.2, 0.6)
  rhp.set_int("filter_double_steps", 3, 5)
  rhp.set_discrete("hidden_size", [64, 96, 128])
  rhp.set_discrete("bottleneck_bits", [32, 64, 128, 256])
  rhp.set_discrete("video_num_target_frames", [4])
  rhp.set_float("bottleneck_noise", 0.0, 0.2)