[wayland] Create a KGlobalAccelD during startup

We need to grab the DBusInterface before anything interacts with
org.kde.kglobalaccel to prevent kglobalaccel5 from starting.

CMakeLists.txt

@@ -498,6 +498,7 @@ set(kwin_KDE_LIBS
     KF5::ConfigWidgets
     KF5::Crash
     KF5::GlobalAccel
+    KF5::GlobalAccelPrivate
     KF5::I18n
     KF5::Notifications
     KF5::Service

globalshortcuts.cpp

@@ -21,9 +21,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "globalshortcuts.h"
 // kwin
 #include <config-kwin.h>
+#include "main.h"
+#include "utils.h"
 // KDE
 #include <kkeyserver.h>
 #include <KConfigGroup>
+#include <KGlobalAccel/private/kglobalacceld.h>
 // Qt
 #include <QAction>
 
@@ -91,6 +94,16 @@ GlobalShortcutsManager::GlobalShortcutsManager(QObject *parent)
     : QObject(parent)
     , m_config(KSharedConfig::openConfig(QStringLiteral("kglobalshortcutsrc"), KConfig::SimpleConfig))
 {
+    if (kwinApp()->shouldUseWaylandForCompositing()) {
+        m_kglobalAccel = new KGlobalAccelD(this);
+        if (!m_kglobalAccel->init()) {
+            qCDebug(KWIN_CORE) << "Init of kglobalaccel failed";
+            delete m_kglobalAccel;
+            m_kglobalAccel = nullptr;
+        } else {
+            qCDebug(KWIN_CORE) << "KGlobalAcceld inited";
+        }
+    }
 }
 
 template <typename T>

globalshortcuts.h

@@ -27,6 +27,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <QKeySequence>
 
 class QAction;
+class KGlobalAccelD;
 
 namespace KWin
 {
@@ -104,6 +105,7 @@ private:
     QHash<Qt::KeyboardModifiers, QHash<Qt::MouseButtons, GlobalShortcut*> > m_pointerShortcuts;
     QHash<Qt::KeyboardModifiers, QHash<PointerAxisDirection, GlobalShortcut*> > m_axisShortcuts;
     KSharedConfigPtr m_config;
+    KGlobalAccelD *m_kglobalAccel = nullptr;
 };
 
 class GlobalShortcut