Messaging: Language cleanup

No unnecessary boxing, enhanced for loops, redundant checks and throws,
imports (removal, reordering), possible void returns

Change-Id: I7a8e1b2007e3b0906e01b41785c518d02c2f3fab

src/com/android/messaging/util/ConversationIdSet.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.
@@ -21,7 +22,7 @@ import java.util.HashSet;
 
 /**
  * Utility class to make it easy to store multiple conversation id strings in a single string
- * with delimeters.
+ * with delimiters.
  */
 public class ConversationIdSet extends HashSet<String> {
     private static final String JOIN_DELIMITER = "|";