brightness: fix conditions for using doze brightness

See
https://docs.google.com/document/d/1gm0gl7smaa3Kj7jCh98TrsMek3gb7CmnDyeW9H4dNIk/edit?tab=t.0#heading=h.7zgnj8bwqfld
for the issue cause and why this CL fixes it.

Flag: com.android.server.display.feature.flags.normal_brightness_for_doze_parameter
Test: atest DisplayPowerControllerTest
Test: atest AutomaticBrightnessStrategyTest
Bug: 367469916
Change-Id: I040b46c30ced44dac07e3e56553a93d6e235fb93