[PM-1129] iOS 16 Third-Party 2FA OTP handling (#2409)

* [EC-980] Added iOS otpauth handler (#2370)

* EC-980 added Bitwarden as otpauth scheme handler

* EC-980 Fix format

* [EC-981] OTP handling - Set to selected cipher (#2404)

* EC-981 Started adding OTP to existing cipher. Reused AutofillCiphersPage for the cipher selection and refactored it so that we have more code reuse

* EC-981 Fix navigation on otp handling

* EC-981 Fix formatting

* EC-981 Added otp cipher selection callout and add close toolbar item when needed

* PM-1131 implemented cipher creation from otp handling flow with otp key filled (#2407)

* PM-1133 Updated empty states for search and cipher selection on otp flow (#2408)

src/App/Pages/Vault/OTPCipherSelectionPageViewModel.cs

@@ -0,0 +1,79 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Bit.App.Resources;
+using Bit.Core.Abstractions;
+using Bit.Core.Enums;
+using Bit.Core.Utilities;
+using Xamarin.Forms;
+
+namespace Bit.App.Pages
+{
+    public class OTPCipherSelectionPageViewModel : CipherSelectionPageViewModel
+    {
+        private readonly ISearchService _searchService = ServiceContainer.Resolve<ISearchService>();
+
+        private OtpData _otpData;
+        private Models.AppOptions _appOptions;
+
+        public override bool ShowCallout => !ShowNoData;
+
+        public override void Init(Models.AppOptions options)
+        {
+            _appOptions = options;
+            _otpData = options.OtpData.Value;
+
+            Name = _otpData.Issuer ?? _otpData.AccountName;
+            PageTitle = string.Format(AppResources.ItemsForUri, Name ?? "--");
+            NoDataText = string.Format(AppResources.ThereAreNoItemsInYourVaultThatMatchX, Name ?? "--")
+                + Environment.NewLine
+                + AppResources.SearchForAnItemOrAddANewItem;
+        }
+
+        protected override async Task<List<GroupingsPageListGroup>> LoadGroupedItemsAsync()
+        {
+            var groupedItems = new List<GroupingsPageListGroup>();
+            var allCiphers = await _cipherService.GetAllDecryptedAsync();
+            var ciphers = await _searchService.SearchCiphersAsync(_otpData.Issuer ?? _otpData.AccountName,
+                            c => c.Type == CipherType.Login && !c.IsDeleted, allCiphers);
+
+            if (ciphers?.Any() ?? false)
+            {
+                groupedItems.Add(
+                    new GroupingsPageListGroup(ciphers.Select(c => new GroupingsPageListItem { Cipher = c }).ToList(),
+                        AppResources.MatchingItems,
+                        ciphers.Count,
+                        false,
+                        true));
+            }
+
+            return groupedItems;
+        }
+
+        protected override async Task SelectCipherAsync(IGroupingsPageListItem item)
+        {
+            if (!(item is GroupingsPageListItem listItem) || listItem.Cipher is null)
+            {
+                return;
+            }
+
+            var cipher = listItem.Cipher;
+
+            if (cipher.Reprompt != CipherRepromptType.None && !await _passwordRepromptService.ShowPasswordPromptAsync())
+            {
+                return;
+            }
+
+            var editCipherPage = new CipherAddEditPage(cipher.Id, appOptions: _appOptions);
+            await Page.Navigation.PushModalAsync(new NavigationPage(editCipherPage));
+            return;
+        }
+
+        protected override async Task AddCipherAsync()
+        {
+            var pageForLogin = new CipherAddEditPage(null, CipherType.Login, name: Name, appOptions: _appOptions);
+            await Page.Navigation.PushModalAsync(new NavigationPage(pageForLogin));
+        }
+    }
+}