Start implementing control side forEach.

Change-Id: I2d77d908cbb64b26071d9d5a3421f0b195342d2c
diff --git a/libs/rs/rsThreadIO.cpp b/libs/rs/rsThreadIO.cpp
index 6cf07de7..6e959a7 100644
--- a/libs/rs/rsThreadIO.cpp
+++ b/libs/rs/rsThreadIO.cpp
@@ -58,7 +58,7 @@
             LOGE("playCoreCommands error con %p, cmd %i", con, cmdID);
             mToCore.printDebugData();
         }
-        gPlaybackFuncs[cmdID](con, data);
+        gPlaybackFuncs[cmdID](con, data, cmdSize << 2);
         mToCore.next();
     }
     return ret;