AndroidAssetsFileEngineHandler is broken

Descriptions:

It is not possible to list directories android assets files that are located subdirectory of directory with no files.

Preconditions: 

Assume that your android assets dir has following layout

assets
|- dir1
|--- dir2
|------ file1.qml
|--- dir3
|------ file2.qml
|- dir4
|--- dir5
|------ file3.qml
|--- main.qml

And following piece of code:

auto flags =  QDir::Dirs | QDir::NoDotAndDotDot | QDir::Files;
const QDir dir1("assets:/dir1");
const QStringList dir1DirNames = dir1.entryList(flags);
const QDir dir4("assets:/dir4"); 
const QStringList dir4DirNames = dir4.entryList(flags);
qDebug() << "Dir1" << dir1DirNames << "Dir4" << dir4DirNames;

 Actual Result:

Dir1 QList() Dir2 QList("dir5")

 Expected Result:

Dir1 QList("dir2", "dir3") Dir2 QList("dir5")

Analysis:
The issue was introduced by this commit:
https://code.qt.io/cgit/qt/qtbase.git/commit/src/plugins/platforms/android/qandroidassetsfileenginehandler.cpp?id=edd983071e0a90ee8665d2f45916fb575fc25857

and in more detail this line is faulty:
https://code.qt.io/cgit/qt/qtbase.git/tree/src/plugins/platforms/android/qandroidassetsfileenginehandler.cpp?id=edd983071e0a90ee8665d2f45916fb575fc25857#n352

If you'll take a look on the implementation of `AAssetDir_getNextFileName` it explicitly cuts off the directories from the iteration:
https://android.googlesource.com/platform/frameworks/base.git/+/1cadc07dd1e3711fb1e57548038e3026682c5ef8/native/android/asset_manager.cpp#135

causing that in such case all directories will be treated as  `AssetItem::Type::Invalid`