Adds error name for missing devices.
Adds error name for missing devices.

When calling getUserMedia in chrome for just video with no video devices connected we receive error with name DevicesNotFoundError.

nevermind-corp/ljm,dmurtari/lib-jitsi-meet,adambowles/lib-jitsi-meet,damencho/lib-jitsi-meet,jitsi/lib-jitsi-meet,jiyeyuran/lib-jitsi-meet,dmurtari/lib-jitsi-meet,jitsi/lib-jitsi-meet,adambowles/lib-jitsi-meet