KSM: override values upon boot completion

Needed to override values in init.cm.rc that are too aggressive
on our devices.

Change-Id: Iad35272a6fc3c843d474aad4ddcfc79be3893941
Allow get/set service.brcm.bt.* property to radio user

Fixes BT MAC address

Change-Id: I5884f45e2b494c7cab4d90d4b47f169d67923666