Browser support: Update Android Browser support status

Workarounds for Android Browser 4.0-4.3 are present in the code base but
we no longer actively test these versions.

Closes gh-209

Author: mgol

pages/browser-support.html

@@ -16,10 +16,12 @@ <h3>Desktop</h3>
 
 <h3>Mobile</h3>
 <ul>
-	<li>Stock browser on Android 4.0+</li>
+	<li>Stock browser on Android 4.0+<sup>[1]</sup></li>
 	<li>Safari on iOS 7+</li>
 </ul>
 
+<p>[1] Workarounds for Android Browser 4.0-4.3 are present in the code base, but we no longer actively test these versions.</p>
+
 <p>Any problem with jQuery in the above browsers should be reported as a bug in jQuery.</p>
 
 <p><em>(Current - 1) and Current</em> denotes that we support the current stable version of the browser and the version that preceded it. For example, if the current version of a browser is 24.x, we support the 24.x and 23.x versions.</p>