Add permission to access proc_sched_lib_mask_cpuinfo

04-02 10:18:44.776   497   497 W init    : type=1400 audit(0.0:4): avc:
denied { write } for name="sched_lib_name" dev="proc" ino=7792
scontext=u:r:vendor_init:s0 tcontext=u:object_r:proc:s0 tclass=file
permissive=0
04-02 10:18:44.780   497   497 W init    : type=1400 audit(0.0:5): avc:
denied { write } for name="sched_lib_mask_force" dev="proc" ino=7794
scontext=u:r:vendor_init:s0 tcontext=u:object_r:proc:s0 tclass=file
permissive=0

Test: build & check the logs and function.
Bug: 165524141
Bug: 161324271
Change-Id: Iee68db2a4250b68ede5a81ca2d041d7666558dc8