I believe the path is currently default so the saves should be at /storage/emulated/0/Android/data/Game Name/files
You should be able to copy what's in there and then put the saves back in when you uninstall/reinstall the new version, but I admit I didn't have much luck trying to do it on my device. You might need a specific app to see it.
I'll also mention that 0.5.5 is the first version to have the appropriate Android keystore configured so you shouldn't need to manually back up your saves in the future.
Thanks for your patience!