Hotword: Add onStopDetection() for software detectors.

For DSP-based detection, stopRecognition() disables detection at the
sound trigger layer. For software detection, the HotwordDetectionService
must be notified so it can stop detection.

Bug: 189236104
CTS-Coverage-Bug: 183425641
Test: atest CtsVoiceInteractionTestCases
Change-Id: I220d2255e5e500c22723f6e2fbc34860a529f216

4 files changed, 19 insertions, 0 deletions

diff --git a/core/api/system-current.txt b/core/api/system-current.txt
index 6f68e3fe902c..fd72c8d7c60d 100644
--- a/core/api/system-current.txt
+++ b/core/api/system-current.txt
@@ -10565,6 +10565,7 @@ package android.service.voice {
     method public void onDetect(@NonNull android.service.voice.AlwaysOnHotwordDetector.EventPayload, long, @NonNull android.service.voice.HotwordDetectionService.Callback);
     method public void onDetect(@NonNull android.service.voice.HotwordDetectionService.Callback);
     method public void onDetect(@NonNull android.os.ParcelFileDescriptor, @NonNull android.media.AudioFormat, @Nullable android.os.PersistableBundle, @NonNull android.service.voice.HotwordDetectionService.Callback);
+    method public void onStopDetection();
     method public void onUpdateState(@Nullable android.os.PersistableBundle, @Nullable android.os.SharedMemory, long, @Nullable java.util.function.IntConsumer);
     field public static final int INITIALIZATION_STATUS_SUCCESS = 0; // 0x0
     field public static final int INITIALIZATION_STATUS_UNKNOWN = 100; // 0x64
diff --git a/core/java/android/service/voice/HotwordDetectionService.java b/core/java/android/service/voice/HotwordDetectionService.java
index 7dd3a1dd5ea7..deb6c01a3088 100644
--- a/core/java/android/service/voice/HotwordDetectionService.java
+++ b/core/java/android/service/voice/HotwordDetectionService.java
@@ -192,6 +192,11 @@ public abstract class HotwordDetectionService extends Service {
             mContentCaptureManager = new ContentCaptureManager(
                     HotwordDetectionService.this, manager, options);
         }
+
+        @Override
+        public void stopDetection() {
+            HotwordDetectionService.this.onStopDetection();
+        }
     };
 
     @Override
@@ -349,6 +354,15 @@ public abstract class HotwordDetectionService extends Service {
     }
 
     /**
+     * Called when the {@link VoiceInteractionService}
+     * {@link HotwordDetector#stopRecognition() requests} that hotword recognition be stopped.
+     * <p>
+     * Any open {@link android.media.AudioRecord} should be closed here.
+     */
+    public void onStopDetection() {
+    }
+
+    /**
      * Callback for returning the detection result.
      *
      * @hide
diff --git a/core/java/android/service/voice/IHotwordDetectionService.aidl b/core/java/android/service/voice/IHotwordDetectionService.aidl
index 7ba00982e6a2..72dd45aeeb0f 100644
--- a/core/java/android/service/voice/IHotwordDetectionService.aidl
+++ b/core/java/android/service/voice/IHotwordDetectionService.aidl
@@ -53,4 +53,6 @@ oneway interface IHotwordDetectionService {
     void updateContentCaptureManager(
         in IContentCaptureManager contentCaptureManager,
         in ContentCaptureOptions options);
+
+    void stopDetection();
 }
diff --git a/services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordDetectionConnection.java b/services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordDetectionConnection.java
index aec06431c5fb..0bb09a9de07f 100644
--- a/services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordDetectionConnection.java
+++ b/services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordDetectionConnection.java
@@ -287,6 +287,8 @@ final class HotwordDetectionConnection {
             Slog.d(TAG, "stopListening");
         }
 
+        mRemoteHotwordDetectionService.run(service -> service.stopDetection());
+
         synchronized (mLock) {
             if (mCurrentAudioSink != null) {
                 Slog.i(TAG, "Closing audio stream to hotword detector: stopping requested");