sepolicy: Add policy for vibrator HIDL service

Fixes the following denials:
avc: denied { open } for pid=7530 comm="android.hardwar" path="/sys/devices/virtual/timed_output/vibrator/enable" dev="sysfs" ino=20519 scontext=u:r:android_hardware_vibrator_1_0_service:s0 tcontext=u:object_r:sysfs:s0 tclass=file permissive=1
avc: denied { call } for pid=9173 comm="Binder:7735_C" scontext=u:r:system_server:s0 tcontext=u:r:android_hardware_vibrator_1_0_service:s0 tclass=binder permissive=1

Test: m
Bug: 32021191
Change-Id: I243a86b449794e3c2f0abf91ddcf405eff548d0c