Ship an Upstart job to set boot completion property in Android container

[Ratchanan Srirattanamet]

In some device, there init.rc has something like "on property:init.svc.bootanim=stopped" or "on property:sys.boot_completed=1". Its purpose is to run something when the system has finished booting. As far as I know, and with a conversation with ogra, there's nothing in Ubuntu touch that set these properties. So, I think it'd be good to ship an Upstart job to set these properties so that devices' init.rc that depends on these properties will "just works".

I've attached an Upstart job that could do that. The job (which is a task) will set those properties when Lightdm emits "desktop-session-start" event, which I believe to be the best places to set these properties.