Revert "Move brightnessMaxReason to DisplayBrightnessState"

This reverts commit b92f17c616654a7e96b63407a100c17ed21fe905.

Reason for revert: <Droidmonitor created revert due to b/353093847. Will be verifying through ABTD before submission.>

Change-Id: I3a4da41819dbde9b8fd743900eb6d1e34dba962d
6 files changed