Add missing type field to SVMPSensorEventMessage

Change-Id: I8c6e5e0d1b27d6613fca4204a45d0e4c2cc16f4d
Update event server for new video code

Add support for external fbstream server reachable via a UNIX socket
(eliminates the need for RTSP)

Change-Id: I2eb4e1b02b1250671d8f73a9e75e03a9a2505e7f