configs: Add separate lsm_usecase for LPI and non-LPI

Separate lsm_usecase config for LPI and non-LPI will allow a single
sound trigger session to have a different number of mics depending
on the LPI status.

ALso Add support for barge-in mode feature which allows for the session
to switch between barge-in mode and non barge-in mode for non-LPI usecases.

Change-Id: I654df59a3466c5dd5663f90aed2b87a3ee8adddd