Husires and dkbit are right, you need root privileges to be able to see and access the wallet file. You will have to root your device to be able to copy the wallet file and transfer it to another device. I don't recommend doing this for security reasons.
I just want to post about how pin on Electrum mobile wallet can be very useful, I have the topic already. If the file backup can still make the pin to be enabled, that will not defeat the purpose of the topic, but if the pin is not backup on the file, that will defeat the purpose of my topic. But everything about wallet are backup on its file, I guess the pin will be among the backup.
I got your point and I believe I understand what you are trying to achieve but I think it's pointless!
In order for the second wallet to know about existence of the pin code, that information needs to be already saved on the wallet file. If you have the password required to decrypt the wallet then you can easily retrieve it, which makes it pointless.