Update Gaia API documents for #b92445c187396445aed6a657bf9e037d988bf5d6
    Bug 890440 - Disable system workarounds for notification sent with the deprecated API

Notification which have been sent with the old API should not be treated
with the hacks and workarounds we implemented to circumvent its
limitations. So we detect whether a notification was sent from this
deprecated API based on the form of the id property.