While there is indeed no controlle sample in the android SDK, there is one in the C++ SDK
You'll find the documentation explaining how to develop a controllee in C++ here : https://allseenalliance.org/docs-and-downloads/documentation/alljoyn-control-panel-service-framework-10-usage-guide-linux-cpp
It seems you need to get the code from git and compile it yourself.
https://git.allseenalliance.org/cgit/services/controlpanel.git/tree/cpp/samples
It it actually quite logical as controllee will typically be device with no screen, or any user-interaction mechanism and thus will generally not be based on android but on a C / C++ firmware.