Adds EquipmentInfoDialog

Adds EquipmentInfoDialog, an extension of DialogFragment that displays a detailed view of the equipped items and the modifiers/stats they provide. This view is used as the default right pane fragment in dual pane mode. The view is currently incomplete on content, but the underlying work for getting the information from the hero is in place and now all that is needed is to build the content of the view from that info. The dialog also does not use the DialogBuilder like other existing dialogs, so in single pane mode the title and buttons are still missing.