audiohal: Re-implement effect process using FMQ and IMemory

Result: no hwbinder calls due music processing.

Added IEffect.close method for explicitly freeing up of resources
consumed by the effect before automatic server objects reaping
gets to it.

Added IEffect.setProcessBuffers method for updating the input /
output buffers on the go.

Test: make, use Play Music with effects, check traces
Bug: 30222631
Change-Id: Ia1e1bc7098fab59aa970e0ce4acdb48007409644