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Packages must have at least a ".". The package name you put "layout" does not have ".". You can use layout.project for example. , or any name that contains ".". On android, is advised to name packages, with an inverted domain name to identify who developed. for example: "br.com.microsoft" is a good package name, if microsoft had developed the app. In your case, it could be: "br.com.alexandrelima". These names are only package identifiers, are not linked to the need for existence of sites with the same name.
The message says your package is invalid. Do a test: put the package as: com.exemplo.meuapp
– emanuelsn