Android is really its own platform that happens to use the Linux kernel as a shortcut.
What we're talking about here is really what used to be called GNU/Linux, so the whole platform that is based on the software developed by the various communities.
To be exact, it depends on the generation of hardware. At leat for Intel and AMD, the first version tend to have more shaders, then they switch to ASICs. Intel actually open sourced the shaders that they use.