Messaging: Fix modifiers

We either have too few or too many

Change-Id: I09a9a38b859c68526fcbcdbc7862afe1d693f6c0

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

@@ -1,5 +1,6 @@
 /*
  * 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.
@@ -376,8 +377,8 @@ public class ApnSettingsActivity extends BugleActionBarActivity {
             }
         }
 
-        private class RestoreApnProcessHandler extends Handler {
-            private Handler mCachedRestoreApnUiHandler;
+        private static class RestoreApnProcessHandler extends Handler {
+            private final Handler mCachedRestoreApnUiHandler;
 
             public RestoreApnProcessHandler(Looper looper, Handler restoreApnUiHandler) {
                 super(looper);