kcms: Add explicit includes for transient KAbstractConfigModule headers

Needed after https://invent.kde.org/frameworks/kcmutils/-/merge_requests/174

src/kcms/decoration/kcm.h

@@ -10,6 +10,7 @@
 #include "utils.h"
 
 #include <KQuickManagedConfigModule>
+#include <QAbstractListModel>
 
 class QAbstractItemModel;
 class QSortFilterProxyModel;

src/kcms/desktop/virtualdesktops.h

@@ -9,6 +9,7 @@
 
 #include <KQuickManagedConfigModule>
 #include <KSharedConfig>
+#include <QAbstractItemModel>
 
 class VirtualDesktopsSettings;
 

src/kcms/scripts/module.h

@@ -11,7 +11,7 @@
 #include <KPluginMetaData>
 #include <KPluginModel>
 #include <KQuickConfigModule>
-#include <kpluginmetadata.h>
+#include <QFileInfo>
 
 class KJob;
 class KWinScriptsData;

src/kcms/virtualkeyboard/kcmvirtualkeyboard.h

@@ -7,8 +7,8 @@
 #pragma once
 
 #include <KQuickManagedConfigModule>
-
 #include <KService>
+#include <QAbstractListModel>
 
 class KDesktopFile;
 class VirtualKeyboardData;