Add support for device state based auto-rotation preferences in Settings.

- Creates new preferences that are shown when device-state rotation
  is supported.
- Hides standard preferences when device-state rotation is supported.
- Controllers/Preferences for individual folded/unfolded rotation
  settings are created and added programatically based on the settable
  device states available.

Test: Manually + Unit tests
Bug: 195757480
Change-Id: I16f50fd3664756b363c7eb79e5c35eb0d3b6df17

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

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2022 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 android.text.TextUtils;
+
+import com.android.settings.core.BasePreferenceController;
+
+/**
+ * The top-level preference controller for device state based auto-rotation settings.
+ *
+ * It doesn't do anything on its own besides showing/hiding. The toggling of the settings will
+ * always be done in the details screen when device state based auto-rotation is enabled.
+ */
+public class DeviceStateAutoRotateOverviewController extends BasePreferenceController {
+
+    /** Preference key for when it is used in "accessibility_system_controls.xml". */
+    private static final String ACCESSIBILITY_PREF_KEY = "device_state_auto_rotate_accessibility";
+
+    public DeviceStateAutoRotateOverviewController(Context context, String key) {
+        super(context, key);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return isAvailableInternal() ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
+    }
+
+    private boolean isAvailableInternal() {
+        return isA11yPage()
+                ? DeviceStateAutoRotationHelper.isDeviceStateRotationEnabledForA11y(mContext)
+                : DeviceStateAutoRotationHelper.isDeviceStateRotationEnabled(mContext);
+    }
+
+    private boolean isA11yPage() {
+        return TextUtils.equals(getPreferenceKey(), ACCESSIBILITY_PREF_KEY);
+    }
+}