huashan: tidy up the init scripts

Better match other Sony devices as per Kali request

Change-Id: I2046460786fb5108f236fae91fb0c03a00eadbec
huashan: update selinux policy

(cherry-pick from 10d350e06a28d21e3509338a6eddba011600a4ec in fusion3-common)

Change-Id: I01ae7d72f00553390e4625f0aea94fc17110a94d