Reload the Ambient Light Sensor on Display Change

This change fixes the multi display scenario - when the
underlying display device changes, we should reload the
appropriate ambient light sensor for the default display.

Bug: 198125195
Test: adb shell dumpsys sensorservice
Test: atest com.android.server.display
Change-Id: I8b2d76d916d79f7dae22d81adc3ce69780bf9bfc