Using the same convention in system_init.cpp, you can disable these
services by setting system properties:
system_init.startaudioservice=0
system_init.startmountservice=0
Change-Id: Ie6c0225bf6e204b0b5e3280b29c7d493d08b8a5c
Signed-off-by: Mike Lockwood <lockwood@android.com>