fix(receive-external-activity): npe adapter

[alperozturk96]

Exception java.lang.NullPointerException:
  at com.owncloud.android.ui.activity.ReceiveExternalFilesActivity$2.onQueryTextChange (ReceiveExternalFilesActivity.java:1091)
  at androidx.appcompat.widget.SearchView.onTextChanged (SearchView.java:1198)
  at androidx.appcompat.widget.SearchView$10.onTextChanged (SearchView.java:1736)
  at android.widget.TextView.sendOnTextChanged (TextView.java:13573)
  at android.widget.TextView.handleTextChanged (TextView.java:13702)
  at android.widget.TextView$ChangeWatcher.onTextChanged (TextView.java:17605)
  at android.text.SpannableStringBuilder.sendTextChanged (SpannableStringBuilder.java:1269)
  at android.text.SpannableStringBuilder.replace (SpannableStringBuilder.java:578)
  at androidx.emoji2.text.SpannableBuilder.replace (SpannableBuilder.java:308)
  at android.text.SpannableStringBuilder.replace (SpannableStringBuilder.java:509)
  at androidx.emoji2.text.SpannableBuilder.replace (SpannableBuilder.java:298)
  at androidx.emoji2.text.SpannableBuilder.replace (SpannableBuilder.java:48)
  at android.view.inputmethod.BaseInputConnection.replaceTextInternal (BaseInputConnection.java:1027)
  at android.view.inputmethod.BaseInputConnection.replaceText (BaseInputConnection.java:962)
  at android.view.inputmethod.BaseInputConnection.setComposingText (BaseInputConnection.java:743)
  at android.view.inputmethod.InputConnectionWrapper.setComposingText (InputConnectionWrapper.java:161)
  at android.view.inputmethod.RemoteInputConnectionImpl.lambda$setComposingText$26 (RemoteInputConnectionImpl.java:831)
  at android.view.inputmethod.RemoteInputConnectionImpl.$r8$lambda$soHIVgnaTkxIKf20X9il0IHyeeA (Unknown Source)
  at android.view.inputmethod.RemoteInputConnectionImpl$$ExternalSyntheticLambda28.run (D8$$SyntheticClass)
  at android.os.Handler.handleCallback (Handler.java:995)
  at android.os.Handler.dispatchMessage (Handler.java:103)
  at android.os.Looper.loopOnce (Looper.java:273)
  at android.os.Looper.loop (Looper.java:363)
  at android.app.ActivityThread.main (ActivityThread.java:10060)
  at java.lang.reflect.Method.invoke
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:632)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:975)

[alperozturk96]

/backport to stable-3.36

[github-actions]

blue-Light-Screenshot test failed, but no output was generated. Maybe a preliminary stage failed.

[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	42	42
Correctness	75	75
Dodgy code	253	253
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	34	34
Performance	43	43
Security	18	18
Total	475	475

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/16598.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.