Android: document limitation for QFile::copy() operation for content uri

Document that the operation is not supported.

Pick-to: 6.5 6.4 6.2 5.15
Task-number: QTBUG-98974
Change-Id: I1faacb7af7e11943d6da62313ed104fda063d30d
Reviewed-by: Rami Potinkara <rami.potinkara@qt.io>
Reviewed-by: Nicholas Bennett <nicholas.bennett@qt.io>

src/corelib/io/qfile.cpp

@@ -734,6 +734,9 @@ QFile::link(const QString &fileName, const QString &linkName)
 
     \include qfile-copy.qdocinc
 
+    \note On Android, this operation is not yet supported for \c content
+    scheme URIs.
+
     \sa setFileName()
 */
 
@@ -844,6 +847,9 @@ QFile::copy(const QString &newName)
 
     \include qfile-copy.qdocinc
 
+    \note On Android, this operation is not yet supported for \c content
+    scheme URIs.
+
     \sa rename()
 */