Incorrect organize imports result with config script or AST transform that adds static on-demand import

With this set as the compiler config script, organize imports results in the addition of the synthetic import to the source.
```groovy
withConfig(configuration) {
  imports {
    staticStar 'java.util.concurrent.TimeUnit'
  }
}
```
Organize imports on:
```groovy
class C {
}
```
results in:
```groovy
import static java.util.concurrent.TimeUnit.*

class C {
}
```