Bug 1098192 - Remove unused mutex for ifc_* function calls. r=vchang
Bug 1100876 - Add showOnlyOnce to MozBehavior dict. r=mhenretty, r=smaug

There are some notifications that we know we don't want to resend. For
instance, Voicemail notifications are some, since everytime the network
will be ready it will notify us of the status, so we don't have to
resend it on reboot. We add a 'showOnlyOnce' key in the MozBehavior dict
for this usecase.
Bug 1102986 - Update camera preview media stream with platform media stream expectations. r=roc