configs: Add BT SCO to routes list

- Issue with returning a valid device descriptor
  since BT SCO is not defined in IOProfile.
- First attempt to retrieve devicedescriptor from
  the available HwModule may fail due to address
  and encoded format conditions.
- Further device descriptor query is based on IOProfile
  with devices defined in audio_policy_configuration.
- This change adds BT SCO to IOProfile.

Change-Id: I52225070e97dd702f965ca5dbb5db9d128df1faf