FWIW automanufacturers in China did this. So this isn't anything, or out of the realm of possibility (we do have more red tape in the US, i.e. see what happened w/ the Seattle Flu Study when people tried to be helpful).
I don't have any English source for this. But Boris Johnson requested the same in England, too.
A quick search finds some articles stating they will do this, but nothing about results. But of course politicians and CEOs would never make empty promises...
Wikipedia says one Chinese manufacturer, Geely, sold 1.5 million vehicles last year [0]; that probably includes 700K Volvos [1] (they bought Volvo from Ford in 2010), so I'm guessing 600-700K domestic Chinese-produced vehicles. If they had successfully switched production, we'd be talking, what, 100s of thousands of devices a month? But not a word. If they were even making a few 10s of thousands a month I don't think we'd be having this conversation.
I don't have any English source for this. But Boris Johnson requested the same in England, too.