Prevent voice search from getting stuck in a cancel loop (#2127)

Fixes #1988 Fixes #1989
The search widget would call mMozillaSpeechService.cancel() after
receiving a CANCELED status change and get stuck in a continuous loop.

app/src/common/shared/org/mozilla/vrbrowser/ui/widgets/dialogs/VoiceSearchWidget.java

@@ -200,9 +200,8 @@ public void onSpeechStatusChanged(final MozillaSpeechService.SpeechState aState,
                         setResultState();
                         break;
                     case CANCELED:
-                        // Handle when a cancelation was fully executed
+                        // Handle when a cancellation was fully executed
                         Log.d(LOGTAG, "===> CANCELED");
-                        setResultState();
                         if (mDelegate != null) {
                             mDelegate.OnVoiceSearchCanceled();
                         }