Assigns system user/group to /dev/hidraw* devices.

This allows system_server to access these devices.

Note: This also matches existing ueventd rules used by any
device which followed the Sensor HAL's dynamic sensor README.

Bug: 303522222
Test: ls -l /dev/hidraw0
Change-Id: I0830aca77422d6cab64af05dba1554667737760c