Bug 1107531 - Reporting camera used per room to Telemetry

Reporting camera used in a room to Telemetry system.
It would be better:
Telemetry.updateReport('roomCamera',
                                       params.frontCamera ? 'front' : 'back')

Please note that I've suggested you to change the report name too.

You don't have to wait until the promise is fulfilled to store the report. Please take this out of the then clause (immediately after the Loader.getRoomManager().then(....) instruction would be good)