Add support for Samsung extended AGPS

The AGPS implementation in the GPS chipset used in some Samsung devices
(i9100, i9300) can make use of the Psc field. Adapt the relevant
functions hiding the changes incompatible with other devices under the
AGPS_USE_PSC #define.

Credit to Qaweck from xda-developers forum for finding the meaning
of the field.

Change-Id: Ie4691c79ca379a1f5c0a87500c1b06b56ae7ac0d
GPS: Add QC GPS user to zygoteInit

Change-Id: Ide7af88e2c62375a36a581fadacb486c66fa194b
Grant qcom_oncrpc group to system_server

 * Needed for RPC-based QC GPS

Change-Id: Idebc5f6f8e7f8c136d931d7638338d3611895d8a

Conflicts:

	core/java/com/android/internal/os/ZygoteInit.java

Change-Id: Ifbbba2f7a8b4a80f41ad9fb5a86959f083dd21a2
gps: adding net_raw gid for IPC permission

for AFW to have permission to call loc api

Conflicts:

	core/java/com/android/internal/os/ZygoteInit.java

Change-Id: Ifc7451659431fa1c1998f5d75bfa5f2018a5d054