omx: add (temporary) index for automatic video frc support

Bug: 17383204
Change-Id: I9b22da03ea3f2a7d9dd85042fff442d2414cbc26
diff --git a/include/media/openmax/OMX_AsString.h b/include/media/openmax/OMX_AsString.h
index 18e1e52..0f177a1 100644
--- a/include/media/openmax/OMX_AsString.h
+++ b/include/media/openmax/OMX_AsString.h
@@ -520,7 +520,7 @@
         case OMX_IndexParamVideoAndroidVp8Encoder:      return "ParamVideoAndroidVp8Encoder";
         case OMX_IndexParamVideoHevc:                   return "ParamVideoHevc";
 //      case OMX_IndexParamSliceSegments:               return "ParamSliceSegments";
-//      case OMX_IndexConfigAutoFramerateConversion:    return "ConfigAutoFramerateConversion";
+        case OMX_IndexConfigAutoFramerateConversion:    return "ConfigAutoFramerateConversion";
         default:                                        return asString((OMX_INDEXTYPE)i, def);
     }
 }