[SG-223] Mobile username generator (#2033)

* SG-223 - Changed page title and password title

* SG-223 - Refactored generated field
* Changed position of generated field
* Replaced buttons generate and copy for icons

* SG-223 - Refactor type to passwordType

* SG-223 - Added password or username selector
* Added string for label type selection

* SG-223 - Added logic for different types of username
* Added strings of new types

* [SG-223] - Added UI components for different username types
* Added static strings for new labels
* Added viewmodel properties to support username generation and their respective options

* [SG-223] Added control over type picker visibility

* [SG-223] Refactored username entry on add edit page and added generate icon
* Added GenerateUsername command

* [SG-223] - Implemented service for username generation

* [SG-223] - Added support for username generation for item creation flow
* Implemented cache for username options
* Added exception handling for api calls

* [SG-223] - Remove unused code

* [SG-223] - Added a new display field for username generated and respective command
* Added description label for each type of username
* Changed defautl value of username from string.Empty to -

* [SG-223] - Removed some StackLayouts and refactored some controls

* [SG-223] - Refactored properties name

* [SG-223] - Added visibility toggle icon for api keys of forwarded email username types

* [SG-223] - Refactored nested StackLayouts into grids.

* [SG-223] - Refactor and pr fixing

* [SG-223] - Removed string keys from Resolve
- Added static string to resources

* [SG-223] - Refactored Copy_Clicked as AsyncCommand
- Improved exception handling
- Refactored TypeSelected as GeneratorTypeSelected

* [SG-223] - Renamed PasswordFormatter

* [SG-223] - Refactored VM properties to use UsernameGenerationOptions
* Removed LoadUsernameOptions

* [SG-223] - Refactored added pickers to use SelectedItem instead SelectedIndex
* Deleted PickerIndexToBoolConverter as it isn't needed anymore

* [SG-223] -  Refactored and simplified Grid row and column definitions

* [SG-223] - Refactored Command into async command
* Added exception handling and feedback to the user

* [SG-223] - Refactored GeneratorType picker to use Enum GeneratorType instead of string

* [SG-223] - Changed some resource keys

* [SG-223] - Refactor method name

* [SG-223] - Refactored code and added logs for switch default cases

* [SG-223] - Added flag to control visibility when in edit mode

* [SG-223] - Added suffix Parenthesis to keys to prevent future conflicts

* [SG-223] - Refactored multiple methods into one, GetUsernameFromAsync
* Removed unused Extensions from enums

* [SG-223] - Added exception message

* [SG-223] - Added localizable enum values through LocalizableEnumConverter

* [SG-223] - Fixed space between controls

* [SG-223] - Removed unused code and refactored some variables and methods names

* [SG-223] - Removed unused code and refactored constant name to be more elucidative

* [SG-223] - Removed unused variable

src/Core/Utilities/ServiceContainer.cs

@@ -84,6 +84,7 @@ namespace Bit.Core.Utilities
             var eventService = new EventService(apiService, stateService, organizationService, cipherService);
             var userVerificationService = new UserVerificationService(apiService, platformUtilsService, i18nService,
                 cryptoService);
+            var usernameGenerationService = new UsernameGenerationService(cryptoService, apiService, stateService);
 
             Register<ITokenService>("tokenService", tokenService);
             Register<IApiService>("apiService", apiService);
@@ -107,6 +108,7 @@ namespace Bit.Core.Utilities
             Register<IEventService>("eventService", eventService);
             Register<IKeyConnectorService>("keyConnectorService", keyConnectorService);
             Register<IUserVerificationService>("userVerificationService", userVerificationService);
+            Register<IUsernameGenerationService>(usernameGenerationService);
         }
 
         public static void Register<T>(string serviceName, T obj)