For QT_PLATFORM_UIKIT 'PicturesLocation' manually appended by "assets-library://".
When converted to QUrl, such a path becomes a valid url, having empty path
and scheme "assets-library". Later in QIOSFileDialog we convert this
path (options()->initialDirectory()) calling QUrl::toLocalPath, which
gives us an empty string and thus we erroneusly select document picker
dialog, not an image picker. So let's also check a scheme, not path
only.
Pick-to: 6.5 6.4 6.2
Fixes: QTBUG-107844
Change-Id: If4dd453549b37933cba07b5d7af6e45f2504dd29
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
402a526b2a