Fix NodeAccessControlHandlerInterface doxygen

Perfect

Since this method basically just wraps NodeGrantDatabaseStorageInterface::write(), I double-checked that method too. That method still has these parameters. However, NodeGrantDatabaseStorageInterface::write() does this:

    $grants = $this->acquireGrants($node);
    $this->grantStorage->write($node, $grants, NULL, $delete);

So since it is providing defaults, looks like this patch is correct. I also double-checked that the base implementation has the correct signature.

See also #2473021: Deprecate NodeAccessControlHandlerInterface::writeGrants() for removal in Drupal 9.0.x.

This issue only changes documentation, so per https://www.drupal.org/core/beta-changes, this can be completed any time during the Drupal 8 beta phase. Committed and pushed to 8.0.x. Thanks @webflo for catching this!