Reset HotwordDetectionConnection when VoiceInteractionService crashes

I use the command "adb shell kill <pid>" and "adb shell am crash
<package>" to test, it works well.

Bug: 193421614
Test: manual test
Test: atest CtsVoiceInteractionTestCases
Test: atest CtsVoiceInteractionTestCases --instant
Change-Id: I53206f07801b0fac588cb23fa2b91cac561547ed

services/voiceinteraction/java/com/android/server/voiceinteraction/VoiceInteractionManagerServiceImpl.java

@@ -126,6 +126,9 @@ class VoiceInteractionManagerServiceImpl implements VoiceInteractionSessionConne
     final ServiceConnection mConnection = new ServiceConnection() {
         @Override
         public void onServiceConnected(ComponentName name, IBinder service) {
+            if (DEBUG) {
+                Slog.d(TAG, "onServiceConnected to " + name + " for user(" + mUser + ")");
+            }
             synchronized (mServiceStub) {
                 mService = IVoiceInteractionService.Stub.asInterface(service);
                 try {
@@ -137,7 +140,13 @@ class VoiceInteractionManagerServiceImpl implements VoiceInteractionSessionConne
 
         @Override
         public void onServiceDisconnected(ComponentName name) {
-            mService = null;
+            if (DEBUG) {
+                Slog.d(TAG, "onServiceDisconnected to " + name);
+            }
+            synchronized (mServiceStub) {
+                mService = null;
+                resetHotwordDetectionConnectionLocked();
+            }
         }
     };
 
@@ -575,6 +584,20 @@ class VoiceInteractionManagerServiceImpl implements VoiceInteractionSessionConne
         mHotwordDetectionConnection.forceRestart();
     }
 
+    void resetHotwordDetectionConnectionLocked() {
+        if (DEBUG) {
+            Slog.d(TAG, "resetHotwordDetectionConnectionLocked");
+        }
+        if (mHotwordDetectionConnection == null) {
+            if (DEBUG) {
+                Slog.w(TAG, "reset, but no hotword detection connection");
+            }
+            return;
+        }
+        mHotwordDetectionConnection.cancelLocked();
+        mHotwordDetectionConnection = null;
+    }
+
     public void dumpLocked(FileDescriptor fd, PrintWriter pw, String[] args) {
         if (!mValid) {
             pw.print("  NOT VALID: ");