Use consistent organization (1)

[guidezpl]

To silence the following error, we should pick a consistent bundle identifier
Ambiguous organization in existing files: {com.example, io.flutter.demo}. The --org command line argument must be specified to recreate project.

Acceptance Criteria

• Same organization used for all files

[rami-a]

io.flutter.demo should be used, that matches what Play Store and App Store expect.