sepolicy: add rules for on-demand insmod/rmmod of wigig driver

Add rules to allow wigig HAL service to insmod/rmmod the wigig module,
similar to the WIFI HAL. This is needed because the wigig chip
leaks power while wigig driver is loaded, so the driver must be
unloaded when wigig framework is disabled.

Change-Id: Id96f50020b3e7028b2c6bdd319383879565087c6