commit a49b90befed61e22f382ce320df13cb6cc3031ed
author Daniel Solomon <solomondaniel@google.com> Fri Sep 17 15:29:49 2021 -0700
committer Daniel Solomon <solomondaniel@google.com> Thu Sep 30 17:18:03 2021 -0700
tree ed0faa4ed476942104ecd34ffaec9a4f1acf0e46
parent de460d153e060a42d37a8417f6908c714237bb0a

Change DisplayModeDirector's brightness source to DisplayListener

Currently, DisplayModeDirector listens to brightness changes from Settings.
However, brightness value in Settings is overridden for various reasons
inside DisplayPowerController before being propagated to HALs. As a
result, the brightness value that DisplayModeDirector is acting on isn't
always the brightness value that gets applied to the display.

This change,
- Changes DisplayPowerController so that the final brightness value (after all
modifications) is saved.
- Changes DisplayModeDirector to use DisplayManager.DisplayListener to
observe brightness changes and then retrieve and act on the final
brightness value saved in DisplayPowerController.

Bug: 199955532
Test: atest DisplayModeDirectorTest
Change-Id: Ia6dd7d194b6913d2942bea9c29a2011b8058beef