add device specific voice processing descriptors

Add the possibility to define device specific effect descriptors
in libqcomvoiceprocessingdescriptors.so. This will allow
exposing different implementation UUISs according to device tuning
so that applications can distinguish one from the other.

Bug: 9126576.

Change-Id: I8e6ca00cbc6386498a5df99b514b1c7b7b1fd82c