Although there isn't a specific CSS hack for older Android devices, I have discovered a workaround that will exclude iPads and iPhones (any iOS device). While this method may not be effective for older non-'ultra high definition' devices, it should work well for most modern ones.
Here's how to implement it:
/* Modern Android devices (Android 4.0+, Chrome 15+, Safari 5.1+, and Opera 14+) */
_:-webkit-full-screen, :root .selector { color:blue; }
You can test this on my live CSS hacks test page:
OR
This method works because iOS does not support the :-webkit-full-screen CSS pseudo-class, which is typically included in webkit distributions.
As of the time of writing, Safari is in version 8, and Chrome is in Development/Canary versions up to 41.
Enjoy exploring this hack!