Add a script to prepare a Bazel environment am: 52534a2703 am: 7ddda3ee6c am: db5ca8a0c9 am: 2919da26e0 am: dcb7ab6b6c

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

Change-Id: Ice1407fc02bb0453016eece60fff0984f14c68b8
tree: 9b1fcaaa73ea317a369daf80e024642014d7fb70
  1. experiments/
  2. OWNERS