build: Don't copy APN list from emulator

This list is severely incomplete and is overwriting the proper APN list in the vendor
directory.

Change-Id: I0e1b1d26e0cdf2df9a05462f0c9343bd3115635b
build: Add script to generate extra images

Change-Id: I53081c7a2b4f18bc8c8a27b04d311a6b078b2022