Returns an array mapping location result keys w/ bool values indicating whether
that information is supported by this provider. If it is not supported, that means
this provider either cannot get this information, or is not configured to get it.
eg. array(self::CONTINENT_CODE_KEY => true,
self::CONTINENT_NAME_KEY => true,
self::ORG_KEY => false)
The result is not guaranteed to have keys for every type of location
info.