Sync with running App

Sometimes the debug connection closes and I have to click again on the Debug button, which triggers a build and an install that can take up to 2 minutes. Can't the plugin see that the App is already running on the emulator and just resync the debug connection instead? Something like an Attach.

Start at the Debug button flow and trace how the plugin detects an existing Flutter app on the emulator and establishes its debug connection. Compare that path with the requested Attach behavior; done means reconnecting to the running app without another build or install.

Written by the indexing model from the issue text.