tst_qquickitem2 fails on Android

tst_qquickitem2 fails with the error:

FAIL!  : tst_QQuickItem::colorGroup() 'QTest::qWaitForWindowActive(&view)' returned FALSE. ()
   Loc: [/home/andreasbuhr/development/qtdev/qtdeclarative/tests/auto/quick/qquickitem2/tst_qquickitem.cpp(3796)]

The error is in tests added in summer 2021:

introduced in
https://codereview.qt-project.org/c/qt/qtdeclarative/+/353901

There is an "activationThief" stealing activation by

    QWindow activationThief;
    activationThief.show();
    activationThief.requestActivate();

This works, but the view stealing back activation by

    view.requestActivate();
    QVERIFY(QTest::qWaitForWindowActive(&view));

fails on Android.

Observation:
It works if the activationThief is hidden before. The change in https://codereview.qt-project.org/c/qt/qtdeclarative/+/405644 circumvents the problem.