The deynamic mode has the virtual keyboard enabled for touch events, but
disabled for all other input events. This is registered through an input
event spy. The boolean enabled is turned into a three state enum
disbaled, dynamic and enabled. The status notifier switches to the next
mode.
The dbus interface is not adjusted and still switches just between
enabled and disabled. According to lxr the dbus interface is not used
anywhere so there is the question whether it makes sense to update at
all.