ppb_audio: try to recover if snd_pcm_avail_update returns error
ppb_audio: try to recover if snd_pcm_avail_update returns error

and handle EINTR error returned by snd_pcm_recover itself

reuben/freshplayerplugin,reuben/freshplayerplugin,Papapashu/freshplayerplugin,reuben/freshplayerplugin,Papapashu/freshplayerplugin,grevutiu-gabriel/freshplayerplugin,Papapashu/freshplayerplugin,grevutiu-gabriel/freshplayerplugin