App got crashed on calling CRFileSaver.saveFile() method on emulator

On emulator ( SDK 28 ) saving file via CRFileSaver.saveFile() method results in app crashed with following error, **However it's working properly in real device with android 12**
>D/FileSaverImpl(11496): saveFileBeforeSDK29: Saving /data/user/0/com.example.simple_invoice/cache/invoice.pdf
>E/AndroidRuntime(11496): FATAL EXCEPTION: main
>E/AndroidRuntime(11496): Process: com.example.simple_invoice, PID: 11496
>E/AndroidRuntime(11496): java.io.FileNotFoundException: open failed: EACCES (Permission denied)

My code sample is :
`final output = await getTemporaryDirectory();`
`final file = File('${output.path}/invoice.pdf');`
`await file.writeAsBytes(await pdf.save());`
`String? res = await CRFileSaver.saveFile(file.path);`

Start by reproducing CRFileSaver.saveFile() on an Android SDK 28 emulator and follow the FileSaverImpl saveFileBeforeSDK29 path shown in the log. Compare the behavior with Android 12 and verify that saving the file created from getTemporaryDirectory() completes without EACCES and returns successfully.

Written by the indexing model from the issue text.