Implement the prepare_bazel_test_env script am: 2178bb2de9

Original change: https://android-review.googlesource.com/c/platform/build/pesto/+/1677135

Change-Id: I9ebfd742d504a90b8ecae6570c923decebf04dd0
tree: 1f4fb1e246017932b2da3d2fa21066b184195803
  1. experiments/
  2. OWNERS