Add overload for LazyStringArrayList.add(String): boolean

This is a performance optimisation that avoids us going through from
AbstractList.add(E) to LazyStringArrayList.add(int index, String) and then
having to call the index-based add in ArrayList, which has more bookkeeping
around moving elements across if necessary.

We can avoid that bookkeeping by adding this overload.

Also, group together overloads to squash a style warning.

PiperOrigin-RevId: 650089286

java/core/src/main/java/com/google/protobuf/LazyStringArrayList.java

@@ -145,6 +145,29 @@ public class LazyStringArrayList extends AbstractProtobufList<String>
     modCount++;
   }
 
+  @Override
+  @CanIgnoreReturnValue
+  public boolean add(String element) {
+    ensureIsMutable();
+    list.add(element);
+    modCount++;
+    return true;
+  }
+
+  @Override
+  public void add(ByteString element) {
+    ensureIsMutable();
+    list.add(element);
+    modCount++;
+  }
+
+  @Override
+  public void add(byte[] element) {
+    ensureIsMutable();
+    list.add(element);
+    modCount++;
+  }
+
   @Override
   public boolean addAll(Collection<? extends String> c) {
     // The default implementation of AbstractCollection.addAll(Collection)
@@ -197,20 +220,6 @@ public class LazyStringArrayList extends AbstractProtobufList<String>
     modCount++;
   }
 
-  @Override
-  public void add(ByteString element) {
-    ensureIsMutable();
-    list.add(element);
-    modCount++;
-  }
-
-  @Override
-  public void add(byte[] element) {
-    ensureIsMutable();
-    list.add(element);
-    modCount++;
-  }
-
   @Override
   public Object getRaw(int index) {
     return list.get(index);