fixes https://github.com/flutter/flutter/issues/120408

Added two gradle tasks, one for grabing the application id, one for grabbing app link domains.

Added a new vmservices to call these two gradle tasks and return the result.

The expected work flow is that the devtool will first call a vmservices to grab all avaliable build variants. It will then choose one of the build variant and call this new services to get application id and app link domains.