docstr: Test generating initial random trajectories, stop at max steps.
code: def test_task_random_initial_trajectories_and_max_steps(self):
      """Test generating initial random trajectories, stop at max steps."""
      task = rl_task.RLTask(
          DummyEnv(), initial_trajectories=1, max_steps=9
      )
      stream = task.trajectory_slice_stream(max_slice_length=1)
      next_slice = next(stream)
      self.assertEqual(next_slice.observation.shape, (1, 2))
  
imports: import os
  from absl.testing import absltest
  import gym
  import numpy
  from trax import test_utils
  from trax.rl import task
label_desc: Use image node_id 14 for calling the TaskTest obj's underlying member method code with example usage: obj.test_task_random_initial_trajectories_and_max_steps() without return types