Find new recognizer if old one is gone

Before, RecognitionManagerService just cleared the recognizer
setting, which the Settings app really doesn't like.

Bug: 6332933
Change-Id: If4f9b583c304c5ea99021dddda50fca55e3ac541

services/java/com/android/server/RecognitionManagerService.java

@@ -75,7 +75,10 @@ public class RecognitionManagerService extends Binder {
             try {
                 mContext.getPackageManager().getServiceInfo(comp, 0);
             } catch (NameNotFoundException e) {
-                setCurRecognizer(null);
+                comp = findAvailRecognizer(null);
+                if (comp != null) {
+                    setCurRecognizer(comp);
+                }
             }
         } else {
             comp = findAvailRecognizer(null);