soundtrigger: Define v2.1 HAL

SoundTrigger 2.1 HAL is an extension to 2.0 fixing
the issue with of data blobs of arbitrary size that
can't outgrow HwBinder's IPC transaction size limit.
Instead of vectors, shared memory handles are used.

Added methods for getting and setting parameters.
The parameters are opaque to the framework, it does
not interpret them.

Bug: 68823037
Change-Id: I01c0c867e1d13023a22ccf408e84da78947d3bc2
Test: run hardware/interfaces/update-makefiles.sh