openGL ES versions on different devices

Just to update this answer for June 2014.

You can view the statistics on the Android Dashboard at http://developer.android.com/about/dashboards/index.html#OpenGL

Currently,

OpenGL Version       Percentage
1.1 only             0.1%
2.0                  83.6%
3.0                  16.3%

Note that support for one particular version of OpenGL ES also implies support for any lower version (for example, support for version 2.0 also implies support for 1.1).

Android 2.2 and higher supports Open GL ES 2.0, so as of Feb 2 that is 58.4% of phones. Android 1.6 and higher supports Open GL ES 1.1, so that is about 96% of phones.

I think you'll be good with 1.1.