Move gpu_device type and rules to core policy.

Change-Id: I3ce0b4bd25e078698a1c50242aaed414bf5cb517
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Merge "Move gpu_device type and rules to core policy."
Merge android master into master.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>