Merge "Ensure only either RBC or even dimmer can be on" into main

    <!-- Dark UI screen footer action text shown when the when Dark theme turns on/off automatically according to a user bedtime schedule. [CHAR LIMIT=NONE] -->

    <string name="dark_ui_bedtime_footer_action">Bedtime mode settings</string>

    <!-- Even Dimmer setting title. Allows device to reduce brightness even further than standard range. [CHAR LIMIT=NONE] -->

    <string name="even_dimmer_display_title">Even Dimmer</string>

    <string name="even_dimmer_display_title">Even dimmer</string>

    <!-- Even Dimmer setting summary. [CHAR LIMIT=NONE] -->

    <string name="even_dimmer_display_summary">Allow device to go dimmer than usual</string>

import androidx.preference.Preference;

import androidx.preference.PreferenceScreen;

import com.android.server.display.feature.flags.Flags;

import com.android.settings.R;

import com.android.settingslib.PrimarySwitchPreference;

import com.android.settingslib.core.lifecycle.LifecycleObserver;

    @Override

    public int getAvailabilityStatus() {

        // Successor to this feature is Even Dimmer

        // found in display/EvenDimmerPreferenceController

        // Only allow RBC if even dimmer is not possible on this device

        if (Flags.evenDimmer() && mContext.getResources().getBoolean(

                com.android.internal.R.bool.config_evenDimmerEnabled)) {

            return UNSUPPORTED_ON_DEVICE;

        }

        return ColorDisplayManager.isReduceBrightColorsAvailable(mContext) ? AVAILABLE

                : UNSUPPORTED_ON_DEVICE;

    }