no-implicit-injections has bugs when auto-fixing

1) The added service injection doesn't format properly - it removes indents from the existing line it's inserted above

2) The autofix tries to import the service decorator at the top of the file. It not only does so using the old deprecated syntax `{ inject as service }`, but it fails to detect when the expected modern import `{ service }` already exists and ends up incorrectly duplicating the imports.