Move the frontend server snapshot into the platform SDK
Move the frontend server snapshot into the platform SDK

Change-Id: I15bfa8690fe792a4f0c4ac66a337fdc9c2647626
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/201920
Reviewed-by: Jake Macdonald <28dccc213a1e50b0de348b9cb82c0229ef6b65f0@google.com>
Reviewed-by: Zach Anderson <9f8b31e960a68dade71618f1ff6da6e23a1edfc9@google.com>
Commit-Queue: Jake Macdonald <28dccc213a1e50b0de348b9cb82c0229ef6b65f0@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk