Android: don't append slash for content paths under QAFE

content URI obtain permissions when selected by the Android file
provider, and the Android APIs will treat them as different URIs if
a slash is added and thus such paths will be unaccessible the same way.

Amends d89c32140a.

Change-Id: I8107c7d482dee75f4637e13400b8844b3d3ff804
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>

src/corelib/io/qabstractfileengine.cpp

@@ -19,9 +19,15 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 static QString appendSlashIfNeeded(const QString &path)
 {
-    if (!path.isEmpty() && !path.endsWith(u'/'))
+    if (!path.isEmpty() && !path.endsWith(u'/')
+#ifdef Q_OS_ANDROID
+        && !path.startsWith("content:/"_L1)
+#endif
+        )
         return QString{path + u'/'};
     return path;
 }