audio: Fix tests with respect to visualizer support
audio: Fix tests with respect to visualizer support

liamw9534/mopidy,glogiotatidis/mopidy,rawdlite/mopidy,vrs01/mopidy,dbrgn/mopidy,mopidy/mopidy,bacontext/mopidy,swak/mopidy,adamcik/mopidy,ali/mopidy,tkem/mopidy,quartz55/mopidy,SuperStarPL/mopidy,mokieyue/mopidy,diandiankan/mopidy,mopidy/mopidy,kingosticks/mopidy,quartz55/mopidy,liamw9534/mopidy,vrs01/mopidy,rawdlite/mopidy,jcass77/mopidy,kingosticks/mopidy,pacificIT/mopidy,ali/mopidy,hkariti/mopidy,bencevans/mopidy,adamcik/mopidy,jcass77/mopidy,quartz55/mopidy,SuperStarPL/mopidy,adamcik/mopidy,rawdlite/mopidy,jodal/mopidy,ZenithDK/mopidy,SuperStarPL/mopidy,jmarsik/mopidy,priestd09/mopidy,abarisain/mopidy,bencevans/mopidy,jodal/mopidy,dbrgn/mopidy,pacificIT/mopidy,kingosticks/mopidy,bacontext/mopidy,ali/mopidy,dbrgn/mopidy,jmarsik/mopidy,priestd09/mopidy,pacificIT/mopidy,ZenithDK/mopidy,jmarsik/mopidy,dbrgn/mopidy,ali/mopidy,diandiankan/mopidy,mokieyue/mopidy,jodal/mopidy,diandiankan/mopidy,ZenithDK/mopidy,mopidy/mopidy,glogiotatidis/mopidy,mokieyue/mopidy,quartz55/mopidy,bencevans/mopidy,jmarsik/mopidy,priestd09/mopidy,swak/mopidy,diandiankan/mopidy,mokieyue/mopidy,SuperStarPL/mopidy,tkem/mopidy,swak/mopidy,rawdlite/mopidy,abarisain/mopidy,woutervanwijk/mopidy,bencevans/mopidy,swak/mopidy,vrs01/mopidy,tkem/mopidy,hkariti/mopidy,glogiotatidis/mopidy,vrs01/mopidy,pacificIT/mopidy,hkariti/mopidy,tkem/mopidy,bacontext/mopidy,woutervanwijk/mopidy,glogiotatidis/mopidy,hkariti/mopidy,jcass77/mopidy,ZenithDK/mopidy,bacontext/mopidy