Revert "voice fx: fix effect state control logic."

This reverts commit 3362359a9c11552b8982734c5721158ff7dbf883.

Since this commit was merged, the Echo effect while talking
got much worse. The echo suppression effect doesn't seems to
work at all now.

Change-Id: Ic7310e6d0166715559ca23d40bb61863e0e66cee
Merge "Revert "voice fx: fix effect state control logic."" into kk4.4