>> Saturday, August 10, 2013
Alas, Rahul Garg's assessment of OpenCL on Android is accurate. As of version 4.3, Android devices do not allow OpenCL kernels to be compiled. I've verified this on the Nexus 10, but I can't speak for other devices.
Google has tolerated OpenCL in the past, but as of version 4.3, they've put their foot down. For high-performance computing on Android devices, Renderscript Compute is now the only option.
ETA: Vincent Hindriksen has an excellent write-up on the topic here. I agree wholeheartedly.