floss: Add support of mSBC to embdrv for HFP WBS

Add logic for embdrv to also work for mSBC.
Also add an abstraction of msbc encoder and decoder for HFP.

Bug: 232463744
Tag: #floss
Test: compile and used with the following WBS prototype CL
Change-Id: I083d6ab4f9f38f1518411090a1b865deebb0f9da