Add a script to prepare a Bazel environment am: 52534a2703 am: 7ddda3ee6c am: db5ca8a0c9 am: 2919da26e0 am: 556360caf0

Original change: https://android-review.googlesource.com/c/platform/build/pesto/+/1677130

Change-Id: I7fc33227c92b61ae05ba5f6f5d6dac25b6e7186a
tree: 8649d023cca68532982dcb0cc432054efeca6c7e
  1. experiments/
  2. OWNERS