init: Add a mechanism to extend the property service in device configs

Instead of every so often adding a new set of stuff here for a specific
device, let the device includes overload the property arrays. The
new device_perms.h header documents it

Change-Id: I477e27abebeb4b85abe5fcaf19333999b1625417
Merge "init: Add a mechanism to extend the property service in device configs" into du44