Move concurrent capture enforcement to compat layer

Concurrent capture constraint enforcement is the job of the HAL
starting in V2.4, so it makes sense to push this logic into the compat
layer.
Since the implementation is somewhat involved, this is implemented in
a HAL decorator.

Test: atest SoundTriggerMiddlewareImplTest SoundHw2CompatTest
      Manual verification of basic soundtrigger flows.
Bug: 178722883
Change-Id: Icb83856223ff69b2cb0aa7ef32f986fe0a222f19