Bluetooth: Adding entry for Bluetooth Logger Process

- It is a new process that will run along with Bluetooth
  to collect extensive logs from Bluetooth in error
  scenarios.

- Adding entry here so that bt_logger can be started
  on the run by setting property.

CRs-Fixed: 1085950
Change-Id: Ia1c88f6992e81d527e702654d34b8556d1184fc2