Add a service and flow coordinator for the LinkNewDevice feature. (#4859)

* Add a LinkNewDeviceService that exposes the SDK's grant QR code login methods.

* Add a flow coordinator for linking a new device.

Changes the presentation too.

ElementX/Sources/Other/AccessibilityIdentifiers.swift

@@ -45,6 +45,7 @@ enum A11yIdentifiers {
     static let roomPollsHistoryScreen = RoomPollsHistoryScreen()
     static let manageRoomMemberSheet = ManageRoomMemberSheet()
     static let spaceListScreen = SpaceListScreen()
+    static let linkNewDeviceScreen = LinkNewDeviceScreen()
     
     struct AlertInfo {
         let primaryButton = "alert_info-primary_button"
@@ -314,4 +315,10 @@ enum A11yIdentifiers {
             "\(roomNamePrefix):\(name)"
         }
     }
+    
+    struct LinkNewDeviceScreen {
+        let cancel = "link_new_device_screen-cancel"
+        let mobileDevice = "link_new_device_screen-mobile_device"
+        let desktopComputer = "link_new_device_screen-desktop_computer"
+    }
 }

ElementX/Sources/Other/SDKListener.swift

@@ -29,6 +29,14 @@ extension SDKListener: QrLoginProgressListener where T == QrLoginProgress {
     func onUpdate(state: QrLoginProgress) { onUpdateClosure(state) }
 }
 
+extension SDKListener: GrantQrLoginProgressListener where T == GrantQrLoginProgress {
+    func onUpdate(state: GrantQrLoginProgress) { onUpdateClosure(state) }
+}
+
+extension SDKListener: GrantGeneratedQrLoginProgressListener where T == GrantGeneratedQrLoginProgress {
+    func onUpdate(state: GrantGeneratedQrLoginProgress) { onUpdateClosure(state) }
+}
+
 // MARK: ClientProxy
 
 extension SDKListener: MediaPreviewConfigListener where T == MediaPreviewConfig? {