Initial setup ready for PIN/Biometric app lock. (#1876)

* Add AppLockCoordinator and WindowManager.

ElementX/Sources/UITests/UITestsAppCoordinator.swift

@@ -157,6 +157,10 @@ class MockScreen: Identifiable {
             let coordinator = TemplateScreenCoordinator(parameters: .init())
             navigationStackCoordinator.setRootCoordinator(coordinator)
             return navigationStackCoordinator
+        case .appLockScreen:
+            let appLockService = AppLockService(keychainController: KeychainControllerMock(), appSettings: ServiceLocator.shared.settings)
+            let coordinator = AppLockScreenCoordinator(parameters: .init(appLockService: appLockService))
+            return coordinator
         case .home:
             let navigationStackCoordinator = NavigationStackCoordinator()
             let session = MockUserSession(clientProxy: MockClientProxy(userID: "@mock:matrix.org"),

ElementX/Sources/UITests/UITestsScreenIdentifier.swift

@@ -29,6 +29,7 @@ enum UITestsScreenIdentifier: String {
     case analyticsSettingsScreen
     case migration
     case templateScreen
+    case appLockScreen
     case home
     case settings
     case bugReport