QDS-13458 Move server to device

This MR brings the following changes;

• chore: move websocket server to the device (DS is client now)
• chore: remove complex DS management functions
• chore: update the license headers
• chore: remove zip archive support
• chore: add support for building on desktop

src/backend/backend.cpp

@@ -29,16 +29,23 @@
 
 #include "logger.h"
 
-Q_DECLARE_JNI_CLASS(Secure, "android/provider/Settings$Secure");
-Q_DECLARE_JNI_CLASS(String, "java/lang/String");
-Q_DECLARE_JNI_CLASS(ContentResolver, "android/content/ContentResolver");
+#ifdef QT_DEBUG
+#define buildType "Debug"
+#else
+#define buildType "Release"
+#endif
 
 Backend::Backend(QObject *parent)
     : QObject(parent)
 {
-    // This will allow us to open the app with the QR code
+    // register the `qtdesignstudio` url handler to the Android system
     QDesktopServices::setUrlHandler("qtdesignstudio", this, "parseDesignViewerUrl");
 
+    if (m_settings.deviceUuid().isEmpty()) {
+        qDebug() << "Device UUID not found. Generating a new one.";
+        m_settings.setDeviceUuid(QUuid::createUuid().toString(QUuid::WithoutBraces));
+    }
+
     m_dsManagerThread.setParent(this);
     connect(&m_dsManagerThread, &QThread::started, this, &Backend::initDsManager);
     m_dsManagerThread.start();
@@ -78,8 +85,7 @@ Backend::Backend(QObject *parent)
     qDebug() << "-- Product version: " << QSysInfo::productVersion();
     qDebug() << "-- Build ABI: " << QSysInfo::buildAbi();
     qDebug() << "-- Build CPU architecture: " << QSysInfo::buildCpuArchitecture();
-    qDebug() << "-- Device serial: " << getDeviceSerial();
-    qDebug() << "-- Device unique ID: " << getDeviceUuid();
+    qDebug() << "-- Device unique ID: " << m_settings.deviceUuid();
 }
 
 Backend::~Backend()
@@ -90,40 +96,17 @@ Backend::~Backend()
     m_projectManagerThread.wait();
 }
 
-// this function returns the device serial number (which is really unique)
-// but may not be reliable on all devices. Instead we use the device UUID.
-QByteArray Backend::getDeviceSerial()
-{
-    auto context = QNativeInterface::QAndroidApplication::context();
-    auto contentResolver = context.callMethod<QtJniTypes::ContentResolver>("getContentResolver");
-    auto androidId = QtJniTypes::Secure::callStaticMethod<jstring>("getString",
-                                                                   contentResolver,
-                                                                   QStringLiteral("android_id"));
-    return androidId.toString().toLatin1();
-}
-
-QString Backend::getDeviceUuid()
-{
-    if (m_settings.deviceUuid().isEmpty()) {
-        qDebug() << "Device UUID not found. Generating a new one.";
-        m_settings.setDeviceUuid(QUuid::createUuid().toString(QUuid::WithoutBraces));
-    }
-
-    return m_settings.deviceUuid();
-}
-
 QString Backend::buildInfo() const
 {
-#ifdef QT_DEBUG
-    const QString buildType = "Debug";
-#else
-    const QString buildType = "Release";
-#endif
-    return {QCoreApplication::applicationVersion() + "\nTechnology Preview - "
-            + QString(CMAKE_VAR_GIT_VERSION) + "\nQt " + QString(QT_VERSION_STR) + " - " + buildType
-            + " Build" + "\nQt Quick Components " + QString(CMAKE_VAR_QT_QUICK_COMPONENTS_VERSION)
-            + "\nZXing-Cpp: " + QString(CMAKE_VAR_ZXING_VERSION)
-            + "\nOpenSSL support: " + QVariant(QSslSocket::supportsSsl()).toString()};
+    // clang-format off
+    return {
+        QCoreApplication::applicationVersion() +
+        "\nTechnology Preview - "+ CMAKE_VAR_GIT_VERSION +
+        "\nQt " + QT_VERSION_STR + " - " + buildType + " Build" +
+        "\nQt Quick Components " + CMAKE_VAR_QT_QUICK_COMPONENTS_VERSION +
+        "\nZXing-Cpp: " + CMAKE_VAR_ZXING_VERSION +
+        "\nOpenSSL support: " + QVariant(QSslSocket::supportsSsl()).toString()};
+    // clang-format on
 }
 
 void Backend::updatePopup(const QString &text, bool indeterminate)
@@ -143,12 +126,14 @@ void Backend::initProjectManager()
                                   Qt::QueuedConnection,
                                   Q_ARG(QString, m_lastProjectSenderId));
     });
+
+    updatePopup("Initializing Project Manager...");
 }
 
 void Backend::initDsManager()
 {
     qDebug() << "Design Studio Manager thread started. Initializing Design Studio Manager";
-    m_dsManager.reset(new DesignStudioManager(getDeviceUuid(), this));
+    m_dsManager.reset(new DesignStudioManager(m_settings.deviceUuid(), this));
 
     connect(m_dsManager.get(), &DesignStudioManager::projectReceived, this, &Backend::runProject);
 
@@ -231,18 +216,18 @@ void Backend::scanQrCode()
 
 void Backend::parseDesignViewerUrl(const QUrl &url)
 {
-    if (url.scheme() == "qtdesignstudio") {
-        if (url.host().isEmpty()) {
-            qWarning() << "No Design Studio IP address found in the QR code. URL:"
-                       << url.toString();
-            return;
-        }
-
-        connectDesignStudio(url.host());
-    } else {
+    if (url.scheme() != "qtdesignstudio") {
         qWarning() << "Unknown QR code format";
         qWarning() << "URL:" << url.toString();
+        return;
     }
+
+    if (url.host().isEmpty()) {
+        qWarning() << "No Design Studio IP address found in the QR code. URL:" << url.toString();
+        return;
+    }
+
+    connectDesignStudio(url.host());
 }
 
 void Backend::popupInterrupted()