[automerger] Add EFFECT_CMD_SET_PARAM parameter checking to Downmix and Reverb am: 804632afcd am: bc1d023cc9 am: 03c1ecd9fe am: c4b06bbc1e am: 5c6acee104 am: fcc98fa3b1

Change-Id: Ia0244b37df369a27b4bad024eef06cc56b5e64a2