post_proc: disable effect immediately when routed to invalid devices

Offload effect is still perceived when invalid output device is
connected. We should send disable command immediately once phone is
routed to unexpected device and forbid effect enablement during
temporary disabled state.

Change-Id: I26d4ccfd77037a879622b0437ae3916ff0071a69
CRs-Fixed: 630408
Merge "post_proc: disable effect immediately when routed to invalid devices" into kk4.4