Don't keep sensor listener while screen is off.

Register / unregister on screen off / on intents.

Bug: 69564178
Test: runtest -c com.android.server.display.BrightnessTrackerTest frameworks-service
Test: manual, turn on/off screen and check adb shell dumpsys sensorservice
Change-Id: I7bfb6b35108887baf40d9134d16d13a9f5aa839f