[ALPS03869354] Fix factory mode backlight and vibrator test fail

[Detail]
1. Backlight level test in factory mode fail due to no sepolicy
applied, and sysfs_leds is not allow to add to factory.te.
2. Vibrator test fail due to no corresponding selinux policy.

[Solution]
1. Using hidl for backlight in factory mode.
2. Add vibrator policy.

MTK-Commit-Id: 9470dca00da2fecfb373af94aae3502714d31ea3

Change-Id: I42cd45951054a267449e79f559b3761fce34d497
CR-Id: ALPS03869354
Feature: [Android Default] Backlight