Referring to Bug https://bugzilla.wikimedia.org/show_bug.cgi?id=45622 it seems to that the Hook already not run on mobile. The Google Analytics Code does not appear in source code of mobile Webpage and the Site (unique identifier, md5 hash of a random string) does not show in Google Analytics account.
Tested on:
MW 1.23wmf11
PHP 5.3.3-7+squeeze18 (cgi-fcgi)
MySQL 5.1.73-1-log
MobileFrontend: Latest development build (beta)
tested Wiki: http://www.droidwiki.de/Spezial:Version
Tested with Google Chrome and UA switch to Android 4.0.3.
Version: unspecified
Severity: normal