Implement the prepare_bazel_test_env script am: 2178bb2de9 am: 8eb6bb443e am: 0fa3de4e84 am: 33631428e8 am: 604b852ef3 am: ae23ee0c91

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

Change-Id: Id8f20095c189f3107d5a2f891d2407f68cd77dfd
tree: 8649d023cca68532982dcb0cc432054efeca6c7e
  1. experiments/
  2. OWNERS