[EC-259] Added Account Switching to Share extension on iOS

[fedemkr]

Type of change

• Bug fix
• New feature development
• Tech debt (refactoring, code cleanup, dependency upgrades, etc)
• Build/deploy pipeline (DevOps)
• Other

Objective

Added Account Switching to Share extension on iOS and focused on improving memory usage so that the extension doesn't crash.

Code changes

• MainApplication.cs: Registering AvatarImageSourcePool
• AccountViewCellViewModel.cs: Adapted to use the AvatarImageSourcePool
• AvatarImageSource.cs: Added usings to correct disposal of resources
• AvatarImageSourcePool.cs: Added this pool to reuse instance of AvatarImageSource across the app
• DateTimePicker.xaml, DateTimePicker.xaml.cs: Control that combines date and time picking, also added the lazy way of inserting it to avoid memory spike.
• DateTimeViewModel.cs: ViewModel to be used alongside DateTimePicker
• SendAddEditPage.xaml: Adapted for ...DateTimeViewModel
• SendAddEditPage.xaml.cs: Removed OnClose Action given that now a different page is used by the extension
• SendAddEditPageViewModel.cs: Added DeletionDateTimeViewModel and ExpirationDateTimeViewModel to handle date and time and use the DateTimePicker lazily.
• SendAddOnlyOptionsView.xaml, SendAddOnlyOptionsView.xaml.cs: Added this view to be used lazily by SendAddOnlyPage so avoid memory spiking when loading the page. It's basically the Options part that can be shown/hidden by the button in the SendAddOnlyPage, given that's lazy, it's only going to be loaded the first time the user wants to show the options.
• SendAddOnlyPage.xaml, SendAddOnlyPage.xaml.cs: Alike SendAddEditPage but it only has add mode and controls that are used only on adding and specifically for the iOS share extension. With this we remove code and the memory usage decreases. Also, it just loads the view directly instead of using LoadOnAppearedAsync given that the load time is almost nothing, therefore the loading indicator is not seen and this doesn't make sense, therefore we save some memory and cpu time here as well.
• AccountsManager.cs: Added logging, exception handling and improved invoking on main thread to be awaited properly
• BaseLockPasswordViewController.cs: Added properly disposal of resources and also changed some references to be weak so that things can be garbage collected in the correct moment.
• ExtendedUIViewController.cs: Added method to apply theme to a UINavigationBar and not only to the current NavigationController
• AccountSwitchingOverlayHelper.cs: Improved image disposal
• iOSCoreHelpers.cs: Registering AvatarImageSourcePool and added InitApp<T>(...) method to be reused on the iOS extensions.
• ExtensionNavigationController.cs: Added proper disposal of controllers when navigating.
• LoadingViewController.cs: Added account switching, changed navigation controller to use the ExtensionNavigationController for proper disposal of controllers, improved get provider type and improved navigations to dispose resources appropriately.
• LockPasswordViewController.cs: Added account switching and improved memory usage by disposing resources correctly.
• MainInterface.storyboard: Refactored to use less navigation controllers and add account switching on lock controller.

Screenshots

Before you submit

• I have checked for formatting errors (dotnet tool run dotnet-format --check) (required)
• I have added unit tests where it makes sense to do so (encouraged but not required)
• This change requires a documentation update (notify the documentation team)
• This change has particular deployment requirements (notify the DevOps team)

[jlf0dev]

I haven't been in mobile land in a little bit, but went ahead and took a look through this just in case no one else has time. I have a couple questions but overall it looks good.