/usr/share/php/Symfony/Component/HttpKernel/HttpCache/ is in php-symfony-http-kernel 2.7.10-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Symfony/Component/HttpKernel/HttpCache/Esi.php
/usr/share/php/Symfony/Component/HttpKernel/HttpCache/EsiResponseCacheStrategy.php
/usr/share/php/Symfony/Component/HttpKernel/HttpCache/EsiResponseCacheStrategyInterface.php
/usr/share/php/Symfony/Component/HttpKernel/HttpCache/HttpCache.php
/usr/share/php/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategy.php
/usr/share/php/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategyInterface.php
/usr/share/php/Symfony/Component/HttpKernel/HttpCache/Ssi.php
/usr/share/php/Symfony/Component/HttpKernel/HttpCache/Store.php
/usr/share/php/Symfony/Component/HttpKernel/HttpCache/StoreInterface.php
/usr/share/php/Symfony/Component/HttpKernel/HttpCache/SurrogateInterface.php