I'd have to admit that Cisco's support for Jabber on their CME platform has been nothing but a disappointment. They initially supported the android platform but then pull out for some unknown reason.
I personally contacted Cisco about supporting Jabber for the android platform (they support Apple since version 8.6!), but never received a clear answer. CME will most probably allow you to configure the jabber client, however, installing it and getting it to work on an android device, is a completely different thing. I had a special engineering edition shared with me by Cisco, in order to get it to work for a customer who actually decided to by the CME product because of Jabber for android!
This special engineering edition of Jabber was offered by Firewall.cx. but had to be removed following Cisco's request as they do not allow sharing of such versions of the application.
You'll find our article which covers the installation and configuration of CME/Jabber for android/iphone here:
You'll certainly have to try for your self and see if you can find a jabber for android version that works with CME 10.5 and your android device, but if all fails, I'd suggest you simply revert to a SIP client to save yourself the hassle and fustration.