[Android] Future Compatibility with Google Play 64-bit
In short – ensure your Android device support 64-bit in case of future. Consider moving your account to a supported device because unsupported devices may not launch PAD in the future
It appears that this is not just for PAD, but for many apps on Google Play as that is the newest requirement starting August 1, 2019.
How to transfer data
Aside from Data Transfer (which requires a 30 day cooldown to transfer again), you can use Social Media Linking (Facebook) or Game Data Migration (Google account) transfer data between accounts.
Here are instructions from GungHo NA: