fix java.lang.NullPointerException onActivityResult

Author: MaximBelov

src/android/SMSRetriever.java

@@ -253,7 +253,9 @@ public void onActivityResult(int requestCode, int resultCode, Intent intent) {
 
             }
         } catch (ApiException | NullPointerException ex) {
-            getPhoneNumberCallbackContext.error(ex.getMessage());
+            if(ex instanceof ApiException){
+                getPhoneNumberCallbackContext.error(ex.getMessage());
+            }
             ex.printStackTrace();
         }
     }