Encryption Flow Coordinators. (#3471)

* Manage the secure backup screens with flow coordinators.

* Add UI tests for the EncryptionSettingsFlowCoordinator.

* Realise that the settings flow can't reset anymore and remove the sub-flow 🤦‍♂️

* Add UI tests for the EncryptionResetFlowCoordinator.

ElementX/Sources/Mocks/SDK/IdentityResetHandleSDKMock.swift

@@ -0,0 +1,22 @@
+//
+// Copyright 2024 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+// Please see LICENSE in the repository root for full details.
+//
+
+import Foundation
+import MatrixRustSDK
+
+extension IdentityResetHandleSDKMock {
+    struct Configuration { }
+    
+    convenience init(_ configuration: Configuration) {
+        self.init()
+        
+        authTypeReturnValue = .uiaa
+        resetAuthClosure = { _ in
+            try await Task.sleep(for: .seconds(60))
+        }
+    }
+}