Merge "Add the javadoc for HotwordDetectionService" into sc-dev

import java.util.function.IntConsumer;

/**

 * Implemented by an application that wants to offer detection for hotword. The system will

 * start the service after calling {@link VoiceInteractionService#setHotwordDetectionConfig}.

 * Implemented by an application that wants to offer detection for hotword. The service can be used

 * for both DSP and non-DSP detectors.

 *

 * The system will bind an application's {@link VoiceInteractionService} first. When {@link

 * VoiceInteractionService#createHotwordDetector(PersistableBundle, SharedMemory,

 * HotwordDetector.Callback)} or {@link VoiceInteractionService#createAlwaysOnHotwordDetector(

 * String, Locale, PersistableBundle, SharedMemory, AlwaysOnHotwordDetector.Callback)} is called,

 * the system will bind application's {@link HotwordDetectionService}. Either on a hardware

 * trigger or on request from the {@link VoiceInteractionService}, the system calls into the

 * {@link HotwordDetectionService} to request detection. The {@link HotwordDetectionService} then

 * uses {@link Callback#onDetected(HotwordDetectedResult)} to inform the system that a relevant

 * keyphrase was detected, or if applicable uses {@link Callback#onRejected(HotwordRejectedResult)}

 * to inform the system that a keyphrase was not detected. The system then relays this result to

 * the {@link VoiceInteractionService} through {@link HotwordDetector.Callback}.

 *

 * @hide

 */