shamu: Allow rild to parse through procfs

Cherry-pick of commit 9573ae22f50c9afdaf16fb91cf8ea0185e89a39b.

rild needs to obtain the pid of netmgrd to establish unicast
netlink message communication with netmgrd. rild does this
currently by parsing through procfs and hence needs access
to netmgrd domain.

Also suppress other audit logs triggered by this procfs search
until the underlying mechanism is replaced.

Addresses the following denials:

   type=1400 audit(2567.649:197): avc: denied { search } for pid=1190 comm="rild" name="1" dev="proc" ino=11739 scontext=u:r:rild:s0 tcontext=u:r:init:s0 tclass=dir permissive=0
   type=1400 audit(1548.919:122): avc: denied { read } for pid=1181 comm="rild" name="stat" dev="proc" ino=14756 scontext=u:r:rild:s0 tcontext=u:r:init:s0 tclass=file permissive=0
   type=1400 audit(2167.259:82): avc: denied { open } for pid=1183 comm="rild" path="/proc/1/stat" dev="proc" ino=4086 scontext=u:r:rild:s0 tcontext=u:r:init:s0 tclass=file permissive=0
   type=1400 audit(2587.889:125): avc: denied { getattr } for pid=1164 comm="rild" path="/proc/1/stat" dev="proc" ino=25356 scontext=u:r:rild:s0 tcontext=u:r:init:s0 tclass=file permissive=0
   type=1400 audit(2587.889:1257): avc: denied { search } for pid=1164 comm="rild" name="2" dev="proc" ino=25252 scontext=u:r:rild:s0 tcontext=u:r:kernel:s0 tclass=dir permissive=0
   type=1400 audit(3925.959:261): avc: denied { search } for pid=1176 comm="rild" name="297" dev="proc" ino=10500 scontext=u:r:rild:s0 tcontext=u:r:ueventd:s0 tclass=dir permissive=0

Bug: 18173330
Change-Id: Id36d838fa03c4c7b7d9dbd417549f0294ca2183e
Add SELinux Policy for RILD to access FSG partition

Cherry-pick of commit 61191ea97e3d2172fe853061ba093d54b55ad95a

QCRIL has to access FSG partition which contains the MCFG MBN files
for downloading to modem.

Bug: 18487207

Change-Id: I628653a9f1593151efe5db39832cadf7d77a5475
Add shamu-specific service_manager access.

Commit: cd82557d4069c20bda8e18aa7f72fc0521a3ae32 removes the global
find and list service_manager permissions.  Add those that are
currently, but not explicitly, used.

Bug: 18106000

Change-Id: Ie0ce8de2af8af2cbe4ce388a2dcf4534694c994a