[FEATURE]-Add new system level action paths for mobile control API

[ndorin]

Is your feature request related to a problem? Please describe.
There are cases where a user interface my need to get information about all the devices and/or rooms in the device manager at runtime.

Describe the solution you'd like
Add /system/devices and /system/rooms action paths to the MobileControlSystemController that will return a status response with all of the devices/rooms for a system (using reflection to get all their interfaces).

This will allow an instance of a user interface application to get the information it needs and then do with it as it sees fit.