Revert "SCREEN_BRIGHTNESS - map 255 to current max"

This reverts commit 002e656a515da3f1d19f1d23ab7b776df3cfd77d.

Reason for revert: Setting brightness using adb (adb shell settings put system screen_brightness ...) results in different brightness being set by DisplayPowerController each time.

Bug: 194791517
Test: atest HighBrightnessModeControllerTest
Test: manually test `settings put system screen_brightness 23` yields
      consistent results
Change-Id: I6b49253b46e4d09a1f4129d3df950c9d36eb6ede
5 files changed