Google's new Android Extension Pack and OpenGL ES 3.1 are supported in the upcoming Android L release. The Android Extension Pack is a set of extensions to OpenGL ES which provides features like tessellation to improve the detail of geometry rendered onscreen, and geometry shaders which can also be used to add detail to what is rendered onscreen as well as to add shadows to a scene. The Android Extension Pack also includes support for compute shaders, and Adaptive Scalable Texture Compression (ASTC).
Tom Olson, work group chair of the OpenGL ES API and director of graphics research at ARM has a great blog entry on ASTC texture compression. Not too technical and includes some great examples and lots of links. A great read for the middle of the week.