Enabled by setting system property ro.config.headless to 1
This will allow the framework to run without starting activities,
system UI and the keyguard.
Framework can still run services, content providers and broadcast receivers.
Change-Id: I96606609a4ede57a2c4c7fb2b6ff060ebf31e3b4
Signed-off-by: Mike Lockwood <lockwood@android.com>