account: add booth mode

Ring/Ring.xcodeproj/project.pbxproj

Ring/Ring/Account/AccountModelHelper.swift

Ring/Ring/AppDelegate.swift

Ring/Ring/Bridging/AccountCreation/AccountAdapter.h

Ring/Ring/Bridging/AccountCreation/AccountAdapter.mm

Ring/Ring/Calls/CallViewController.swift

Ring/Ring/Calls/CallViewModel.swift

Ring/Ring/Calls/Conference/ContactPickerViewController.swift

Ring/Ring/Constants/Generated/Strings.swift

Ring/Ring/Coordinators/AppCoordinator.swift

Ring/Ring/Database/DBHelpers/ConversationDataHepler.swift

Ring/Ring/Database/DBHelpers/InteractionDataHelper.swift

Ring/Ring/Database/DBHelpers/ProfileDataHelper.swift

Ring/Ring/Database/DBManager.swift

...g/Features/ContactRequests/ContactRequestsViewModel.swift

...es/Conversations/Conversation/ConversationViewModel.swift

...ing/Features/Conversations/ConversationsCoordinator.swift

...ures/Conversations/SmartList/Cells/ConversationCell.swift

...onversations/SmartList/Cells/IncognitoSmartListCell.swift

.../Conversations/SmartList/Cells/IncognitoSmartListCell.xib