Question regarding building a minimal kitkat arm build that can run apps?

Greetings,

I apologize in advance if I've asked a question that's been asked ad infinity time on this list.

I am attempting to build the smallest kitkat image that is capable of running a "hello world" activity/apk.

I found the TINY_ANDROID option https://wiki.linaro.org/Platform/Android/UseTinyAndroid. However, it states that zygote, surfaceflinger, keystore, systemui, and installd are not built.

How would I build TINY_ANDROID + those programs. SystemUI isn't a strict requirement. My target is arm-js ( a 32bit arm emulator).

I don't care about i18n, networking, or anything else that isn't strictly required to run an Activity with a window, label, and possibly button.

I am trying to optimize for file size.

Thanks in advance.

Respectfully, Andrew McElroy