Distinguish allow transactions for Public and User decryption flows

[isaacdecoded]

Regarding this thread, we need to distinguish the "allow" method to be called for public and user decryption flows on L1 side in httpz listener, i.e:

1. For User decryptions flow we should call allowAccount method
2. For Public decryptions flow we should call allowPublicDecrypt method

cc @goshawk-3 @dartdart26 @leventdem