This will allow users to disable them if they wish to.
By default, both web and email are enabled for all users, which
is the current default.
This also fixes a bug in the EventLogging portion where user rights
changes would be logged with a user id of -1, instead of the
actual user.
Bug: 55337
Change-Id: I026b9392b085e295fbcd375095c9aed682fc29a2