Indicate support for Android EGL surface config attributes.

Change-Id: Id26f96448c976bedab200713cefa168747251211
Reviewed-on: https://swiftshader-review.googlesource.com/2670
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Greg Hartman <ghartman@google.com>
Tested-by: Greg Hartman <ghartman@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>