Fix build.

Remove reference to undefined open max index extension.

Change-Id: I984b91afad3ca4d279a31048b4112fa9afdba9e9
diff --git a/include/media/openmax/OMX_AsString.h b/include/media/openmax/OMX_AsString.h
index 0f177a1..18e1e52 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);
     }
 }