audioserver: add back perms removed from core policy

Some permissions removed from core policy in commit 23eef195
are needed by shamu but not by other devices (also tested on bullhead).
Move these permissions to shamu's device specific policy.

Addresses:
avc: denied { connectto } for path="/data/misc/audio_cutback/cutback" scontext=u:r:audioserver:s0 tcontext=u:r:rild:s0 tclass=unix_stream_socket permissive=1

avc: denied { read } for name="hw_platform" dev="sysfs" ino=19176 scontext=u:r:audioserver:s0 tcontext=u:object_r:sysfs:s0 tclass=file permissive=1
avc: denied { open } for path="/sys/devices/soc0/hw_platform" dev="sysfs" ino=19176 scontext=u:r:audioserver:s0 tcontext=u:object_r:sysfs:s0 tclass=file permissive=1
avc: denied { getattr } for path="/sys/devices/soc0/hw_platform" dev="sysfs" ino=19176 scontext=u:r:audioserver:s0 tcontext=u:object_r:sysfs:s0 tclass=file permissive=1

Bug: 26990688, 27064332
Change-Id: Ib31087477ff0a76b76ac39da88f9307e4e06ffa5
1 file changed