`NPE` on `HybridFile#getName`

Issue explanation (write below this line)

Exception

• User Action: UI Error
• Request: Application crash
• Version: 3.5.3
• OS: Linux Android 10 - 29
• Device: taimen
• Model: Pixel 2 XL
• Product: taimen
  Crash log

java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.os.AsyncTask$4.done(AsyncTask.java:399)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
at java.util.concurrent.FutureTask.run(FutureTask.java:271)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String androidx.documentfile.provider.DocumentFile.getName()' on a null object reference
at com.amaze.filemanager.filesystem.HybridFile.getName(HybridFile.java:336)
at com.amaze.filemanager.filesystem.Operations$1.doInBackground(Operations.java:122)
at com.amaze.filemanager.filesystem.Operations$1.doInBackground(Operations.java:115)
at android.os.AsyncTask$3.call(AsyncTask.java:378)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
... 3 more

Start with HybridFile#getName in HybridFile.java at line 336 and trace its call from Operations$1.doInBackground in Operations.java at line 122. Use the supplied Android crash path as the reproduction context, and verify that the UI operation no longer crashes when the DocumentFile reference is null.