Well... Technically you can install both. But is required for you as end user, to change Android Manifest in one of the packages, using tools for viewing and editing *.apks. And you must resign it with developer signing keychain. And Android will definetly say that resulting apk is dangerous (because test signing keys).
(plus I remember to been having a real headache when I was doing it, although I don't remeber exactly how I managed to make it work)
Too much work for such small outcome :)
Oh, and BTW - there is a tutorial for how to make android package with Renpy AND set an actual package name right (under Step 3)
https://lewdpixels.com/features/building-your-own-android-a-renpy-howto/