Messaging: Nullability

Change-Id: I8bcde2a868a9c8989971d056be24ff4986e4f8f3

src/com/android/messaging/ui/appsettings/ApnEditorActivity.java

@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2015 The Android Open Source Project
+ * Copyright (C) 2015 The Android Open Source Project     
+ * Copyright (C) 2024 The LineageOS Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,6 +30,8 @@ import android.preference.EditTextPreference;
 import android.preference.Preference;
 import android.preference.PreferenceFragment;
 import android.provider.Telephony;
+
+import androidx.annotation.NonNull;
 import androidx.core.app.NavUtils;
 import android.view.KeyEvent;
 import android.view.Menu;
@@ -64,7 +67,7 @@ public class ApnEditorActivity extends BugleActionBarActivity {
     }
 
     @Override
-    public boolean onOptionsItemSelected(final MenuItem item) {
+    public boolean onOptionsItemSelected(@NonNull final MenuItem item) {
         switch (item.getItemId()) {
             case android.R.id.home:
                 NavUtils.navigateUpFromSameTask(this);