So I did finally get a version of the RGB Android working. Many parts were needed.
Another post on this forum provided an Eclipse project: "ColorWheel Android sample App". Luckily, I know SVN, so it was easy to retrieve it. Thanks to that author, dariosalvi, for his work.
I bought the book "Android Application Development for Dummies: All in One" (AADD). It helped.
Android Studio imports the eclipse project from the File menu.
My Intel I3 with 4GB RAM meets the system requirements, but the default ADB would not load. (AADD advises trying multiple times. I quit after three times.)
I downloaded the Genymotion debugger. After a few attempts it loaded.
There were more than a few edits to the project to get it to work. The one I remember most was deleting what looked like the android() function from build.gradle. I also had to specify Android API 19, rather than the one actually on my target device.
I had another process called EasyTether running that would cause the USB link to try to give my computer web access. I had to remove that.
AADD helped in more than a few places. One was repeating that some of these components have to be started more than once before success, as some are rather cranky. But I found that launching the Genymotion virtual box, walking away for minutes, then launching Android Studio, then walking away for another few minutes, generally ends up with a virtual device that runs.
After programming RFduino easily from either Arduino IDE or VisualMicro (an awesome extension to Visual Studio that is quirky, but gets the job done. It even gives breakpoints.), the many hours it took to get Android Studio running was startling. The fact that Android Studio can take several minutes to boot was a surprise as well.
If I can figure out where this project and all components are, I will post with zipped attachment.