Looking for some input/direction into some home automation.

The Harmony can't communicate with any of those devices except for the light dimmers/switches possibly. I wouldn't recommend it as a whole house solution though.

If you break down each of those systems, there are versions of each that are IP which means the Android can control them (web-based though, not app based.)

If you really want it to be unified and app based (under one app,) you need a control system. The control systems I know that operate on the Android platform are Control4 and Crestron. They will have products that accomplish each layer of automation like lighting, HVAC, access control etc.

For a control system, there are several solutions readily available to DIYers. These include Elve from CodeCore, HomeSeer, Mainlobby/Netremote from Cinemar, CQC, others. These range from the very simple (easier, limited functions) to the complex (and powerful).

Each has their own forum.

I use the Mi Casa Verde Vera/Mios system with Square Connect's SQ Remote. I use it with Schlage locks and Z-Wave lighting and thermostats. It really is the best bang for the buck IMHO.