Configs: lito: Changes for concurrent record usecase.

Add separate backend for headset-mic for
concurrent record usecase.

Disable dedicated headset path for sva.
Headset mic path conflicts between audio recording and sva.

Set the max count to 2 to allow concurrent capture
use cases to be started.

Change-Id: I187c9217066968debd6d458961f658f3ef0cecc8