The light sensor on stock is provided by libsensorserviceextimpl.so, and appears to be a fusion of qti.sensor.high_pwm_rgb and qti.sensor.light_rear. I have no idea how the fusion is performed, so provide a light sensor for AOSP by simply aliasing qti.sensor.high_pwm_rgb. Change-Id: I864a0d84b6a7f85ec2b4bc86bad910d4d7ca2db4