feat(force invert): add force invert Settings preference in A11y > Color and Motion

Bug: 312289375
Test: atest packages/apps/Settings/tests/robotests/src/com/android/settings/accessibility/ColorAndMotionFragmentTest.java
  && atest packages/apps/Settings/tests/robotests/src/com/android/settings/accessibility/ToggleForceInvertPreferenceControllerTest.java
Flag: android.view.accessibility.Flags.forceInvertColor

Change-Id: I2739a1dfecbbddcd240a3113344987ade2b7c717

src/com/android/settings/accessibility/ToggleForceInvertPreferenceController.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2019 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.accessibility;
+
+import android.content.Context;
+import android.provider.Settings;
+import android.view.accessibility.Flags;
+
+import androidx.annotation.VisibleForTesting;
+
+import com.android.settings.R;
+import com.android.settings.core.TogglePreferenceController;
+
+/** A toggle preference controller for force invert (force dark). */
+public class ToggleForceInvertPreferenceController extends TogglePreferenceController {
+
+    public static final String SETTINGS_KEY =
+            Settings.Secure.ACCESSIBILITY_FORCE_INVERT_COLOR_ENABLED;
+
+    @VisibleForTesting
+    static final int ON = 1;
+    @VisibleForTesting
+    static final int OFF = 0;
+
+    public ToggleForceInvertPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public boolean isChecked() {
+        return Settings.Secure.getInt(mContext.getContentResolver(), SETTINGS_KEY, OFF) != OFF;
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        return Settings.Secure.putInt(mContext.getContentResolver(),
+                SETTINGS_KEY, isChecked ? ON : OFF);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return Flags.forceInvertColor() ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
+    }
+
+    @Override
+    public int getSliceHighlightMenuRes() {
+        return R.string.menu_key_accessibility;
+    }
+}