Add night display pref controllers and change UX

- Convert NightDisplaySettings to a DashboardFragment
- Add preference controllers for all Night Display settings
- Change UX for activation from a toggle to a button

Bug: 73739388
Bug: 69912911
Test: make -j100 and make RunSettingsRoboTests -j100
Change-Id: Ia173f16207ba59bf57eb7546cbb1e2dbca67b063

src/com/android/settings/display/NightDisplayIntensityPreferenceController.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.display;
+
+import android.content.Context;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+import com.android.internal.app.ColorDisplayController;
+import com.android.settings.core.SliderPreferenceController;
+import com.android.settings.widget.SeekBarPreference;
+
+public class NightDisplayIntensityPreferenceController extends SliderPreferenceController {
+
+    private ColorDisplayController mController;
+
+    public NightDisplayIntensityPreferenceController(Context context, String key) {
+        super(context, key);
+        mController = new ColorDisplayController(context);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (!ColorDisplayController.isAvailable(mContext)) {
+            return DISABLED_UNSUPPORTED;
+        } else if (!mController.isActivated()) {
+            return DISABLED_DEPENDENT_SETTING;
+        }
+        return AVAILABLE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        final SeekBarPreference preference = (SeekBarPreference) screen.findPreference(
+            getPreferenceKey());
+        preference.setContinuousUpdates(true);
+        preference.setMax(getMaxSteps());
+    }
+
+    @Override
+    public final void updateState(Preference preference) {
+        super.updateState(preference);
+        preference.setEnabled(mController.isActivated());
+    }
+
+    @Override
+    public int getSliderPosition() {
+        return convertTemperature(mController.getColorTemperature());
+    }
+
+    @Override
+    public boolean setSliderPosition(int position) {
+        return mController.setColorTemperature(convertTemperature(position));
+    }
+
+    @Override
+    public int getMaxSteps() {
+        return convertTemperature(mController.getMinimumColorTemperature());
+    }
+
+    /**
+     * Inverts and range-adjusts a raw value from the SeekBar (i.e. [0, maxTemp-minTemp]), or
+     * converts an inverted and range-adjusted value to the raw SeekBar value, depending on the
+     * adjustment status of the input.
+     */
+    private int convertTemperature(int temperature) {
+        return mController.getMaximumColorTemperature() - temperature;
+    }
+}