Sets the specified 32-bit integer at the current {@code writerIndex}
in the Little Endian Byte Order and increases the {@code writerIndex}
by {@code 4} in this buffer.
If {@code this.writableBytes} is less than {@code 4}, {@link #ensureWritable(int)}
will be called in an attempt to expand capacity to accommodate.
Sets the specified 32-bit integer at the current {@code writerIndex} in the Little Endian Byte Order and increases the {@code writerIndex} by {@code 4} in this buffer. If {@code this.writableBytes} is less than {@code 4}, {@link #ensureWritable(int)} will be called in an attempt to expand capacity to accommodate.