Welcome to Android Central! I can sort of understand why people may be very casual about remembering (or more importantly, not remembering) the password or PIN they created for their phone lockscreen. But your Bitcoin wallet private key, which is directly associated with real money? Come on, you have to keep that information safe and secure. It's on you.
Might also be someone looking for a way to steal bitcoin by gaining authorization to a wallet they don't have the password for because it isn't theirs. Either way it's rather foolish not to keep a password safe when it's literally worth millions if they are serious.