Add mode manager local service interface

/*

 * Copyright (C) 2023 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 android.os;

import android.annotation.CallbackExecutor;

import android.annotation.NonNull;

import android.annotation.StringDef;

import java.lang.annotation.ElementType;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.lang.annotation.Target;

import java.util.concurrent.Executor;

import java.util.function.Consumer;

/**

 * Mode Manager local service interface.

 * Example usage: LocalServices.get(WearModeManagerInternal.class).

 *

 * TODO(b/288115060): consolidate with {@link com.android.server.policy.WearModeServiceInternal}

 *

 * @hide

 */

public interface WearModeManagerInternal {

    /**

     * Mode manager quick doze request identifier.

     *

     * <p>Unique identifier that can be used as identifier parameter in

     * registerInternalStateObserver

     * to listen to changes in quick doze request state from mode manager.

     *

     * TODO(b/288276510): convert to int constant

     */

    String QUICK_DOZE_REQUEST_IDENTIFIER = "quick_doze_request";

    /**

     * StringDef for Mode manager identifiers.

     *

     * @hide

     */

    @Retention(RetentionPolicy.SOURCE)

    @StringDef({

            QUICK_DOZE_REQUEST_IDENTIFIER

    })

    @Target(ElementType.TYPE_USE)

    @interface Identifier {

    }

    /**

     * Method to register a callback in Mode manager.

     *

     * <p>Callback is executed when there is a change of active state for the

     * provided identifier.

     *

     * <p>Mode manager has active states and configured states where active state is the state of a

     * mode/feature as reflected on the device,

     * configured state refers to the configured value of the state of the mode / feature.

     * For e.g.: Quick doze might be configured to be disabled by default but in certain modes, it

     * can be overridden to be enabled. At that point active=enabled, configured=disabled.

     *

     * <p>

     *

     * @param identifier Observer listens for changes to this {@link Identifier}

     * @param executor   Executor used to execute the callback.

     * @param callback   Boolean consumer callback.

     */

    <T> void addActiveStateChangeListener(@NonNull @Identifier String identifier,

            @NonNull @CallbackExecutor Executor executor,

            @NonNull Consumer<T> callback);

}