Implements previewing qml preview for a qmlproject

To run it requires either designpreview.apk installed
on the device or apks placed in
<QTCREATATORDIR>/share/qtcreator/android/qtdesignviewer/
Apk filename should follow designpreview_$ARCH.apk

Task-number: QAA-512
Change-Id: Ida955b0fac519112d4623166677a7ba8e9afb1f4
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/qmlprojectmanager/qmlproject.cpp

@@ -537,6 +537,12 @@ QVariant QmlBuildSystem::additionalData(Id id) const
         return qtForMCUs();
     if (id == Constants::customQt6Project)
         return qt6Project();
+    if (id == Constants::mainFilePath)
+        return mainFilePath().toString();
+    if (id == Constants::customImportPaths)
+        return customImportPaths();
+    if (id == Constants::canonicalProjectDir)
+        return canonicalProjectDir().toString();
     return {};
 }