hrmmm honestly, I dunno how to install a .apk since I don't have an android myself. only one .apk file should work, I think, which is based on what you're trying to run it on.
arm64-v8a = newer android devices
armeabi-v7a = older android devices
x86_64 = simulator and chromebooks
(Note: I don't actually know what constitutes "newer" or "older")
At least, that's what renpy told me when I compiled it. According to google, all you shouuuld have to do is "Once it's downloaded, open Downloads, tap on the APK file, and tap Yes when prompted. The app will begin installing on your device."