sepolicy: netmgrd needs this permission to log in logcat.

netmgrd needs this policy for logging in logcat
Denial logs:
avc: denied { read } for pid=896 comm="netmgrd" scontext=u:r:netmgrd:s0
tcontext=u:r:netmgrd:s0 tclass=socket permissive=0

Change-Id: Ib642d13a23e163f91a975f2b86b75e899e85dc78