We should store the device used to scrape the layout to avoid using a layout that no longer applies if another device is afterwards used when auditing.

This PR includes:

• Passing the device along when constructing any part of the document so that it can be stored on the elements
• Weakly storing bounding box by device in a Cache on the element
• Replacing direct box-accessing by function to get it by device
• Enabling sending the device to tests through jsx
• Updating the tests that depends on the box
• Adding type parameter for serialization options to Serializer interface
• Elements are serialized with serialization options containing the device for which the box should be serialized