Fix infinite loop when iterating content uri sub-files/dirs

make QAbstractFileEngineIterator::currentFilePath() virtual
and implement it under AndroidContentFileEngine to return
current fileName because content uris shouldn't be constructed
manaully like normal file paths.

Pick-to: 6.4 6.2
Fixes: QTBUG-104776
Change-Id: I4643a73a3bd4019bedaa056c35468117bcec18dc
Reviewed-by: Ville Voutilainen <ville.voutilainen@qt.io>

src/corelib/io/qabstractfileengine_p.h

@@ -206,7 +206,7 @@ public:
 
     virtual QString currentFileName() const = 0;
     virtual QFileInfo currentFileInfo() const;
-    QString currentFilePath() const;
+    virtual QString currentFilePath() const;
 
 protected:
     enum EntryInfoType {

src/plugins/platforms/android/androidcontentfileengine.cpp

@@ -200,3 +200,8 @@ QString AndroidContentFileEngineIterator::currentFileName() const
         return QString();
     return m_entries.at(m_index - 1);
 }
+
+QString AndroidContentFileEngineIterator::currentFilePath() const
+{
+    return currentFileName();
+}

src/plugins/platforms/android/androidcontentfileengine.h

@@ -40,6 +40,7 @@ public:
     QString next() override;
     bool hasNext() const override;
     QString currentFileName() const override;
+    QString currentFilePath() const override;
 private:
     mutable QStringList m_entries;
     mutable int m_index = -1;

src/plugins/platforms/android/qandroidassetsfileenginehandler.cpp

@@ -186,7 +186,7 @@ public:
         return m_currentIterator->currentFileName();
     }
 
-    virtual QString currentFilePath() const
+    QString currentFilePath() const override
     {
         if (!m_currentIterator)
             return {};