Unlikely that drones will be exempt.
Phones are exempt because Apple "convinced" Trump that the consumer base won't pay triple for iDevices. They had to allow Android phones because of monopoly laws.
Electronic components are exempt because...
In my opinion, the answer is NO. I believe this was a deal (led by our friends over at Apple) to spare them from the widespread speculation that price increases for MacBooks and iPhones were imminent. Others will benefit a little as well but...