Summary information on the prevalence of Android versions on devices, screen sizes and versions of OpenGL.
Data from November 1, 2012,

Version History

On the graph: the x-axis - dates in the format MM / DD, the y-axis - the percentage of the total number of devices.
Screen sizes and resolutions
Permissions are divided into ldpi (low), mdpi (medium), hdpi (high), and xhdpi (extra high) groups.
Screen sizes are divided into groups small, normal, large, and xlarge

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Charts:

In more detail:

OpenGL support
90.8% of devices support OpenGL 2.0 and 1.1, and only 9.2% support only OpenGL 1.1.