Add DisplayId to BrightnessTracker

BrightnessTracker is now global.
Pass in the physicaldisplayid of the primary display device of the
logical display that the display power controller is associated with.
This is so that we can determine the brightness changes for each
physical screen.

Bug: 181767734
Test: manual
Change-Id: Iaebb12ec5fe7785545374cc639d7a345ca469db8