Add fake emulator for darwin

This makes sure we do not dowload an emulator release we are not using
when installing system images.

Bug: 253474139
Change-Id: Iecad108a9d1ae800b2ceb3b4203054f84443dc1f
8 files changed
tree: 77bed5f93acf7e55c1dda7ba3e9a58648b2a9281
  1. darwin/
  2. linux/
  3. windows/
  4. README.TXT