Revert "Remove swift dependencies."

This reverts commit 18ddd9aba8cddd0395d68a2fe92912169ac7ad24.

Reason for revert: caused tree closure (https://github.com/flutter/flutter/issues/72823)

Original change's description:
> Remove swift dependencies.
>
> Xcode packages now include the swift dependencies and the extra
> complexity to install it separately is not needed anymore.
>
> Change-Id: I7f9d928c318505b604b8ffe06d8845d2af8f6ea3
> Bug: https://github.com/flutter/flutter/issues/72280
> Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/9460
> Reviewed-by: Keyong Han <keyonghan@google.com>
> Commit-Queue: Godofredo Contreras <godofredoc@google.com>

TBR=godofredoc@google.com,keyonghan@google.com,chillers@google.com,flutter-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: I0016e4b0b2c20ef64fadc1586cdfb0ee5a61e41f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: https://github.com/flutter/flutter/issues/72280
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/9480
Reviewed-by: Keyong Han <keyonghan@google.com>
Commit-Queue: Keyong Han <keyonghan@google.com>