[Feature Request] CLI: Sync Cloud and Quit

[jesdynf]

I'd like the ability to launch RetroArch (on Android, as it happens), have it run a cloud sync, and then close. This is relevant because the device I play on doesn't usually have internet access where I play it from, and I'm interested in seeing it backed up when I get somewhere I do have cloud access.

I can handle scripting when it's to be launched, I just need it to come up (preferably headless), sync, and close.

Thanks!