AMD's OpenCL support on GPU is overall excellent in my experience (2x commercial apps and lots of hobby code), but I tend to mostly use low level OpenCL 1.1 stuff, which I find sufficient.

Also Intel GPUs are actually incredibly competent with OpenCL if you give them wide enough NDrange, and somehow try to look past lack of any fp64 support at all :/

On top of that even the "do no evil" Google, never supported OpenCL on Android, pushing instead their own dialect, Renderscript.

Yes, there are some custom Android deployments that have a libopencl.so kind of thing, it is used by the OEMs themselves, and never exposed as official Android API.

This is why I am investing in AMD. They can only improve!