Add contract address validations to token contracts

[PhilWindle]

In the same way as we constrain the contract address in the account contracts, we should update the token contracts to constrain the public keys used for note encryption.

Interfaces that currently take a 'Point' for things like 'sender' and 'recipient' should take an Aztec address. This will need to be resolved via oracle call to a 'Point' and `partialContractAddress'. The contract should reproduce the Aztec address from the oracle values and constrain it against that which has been provided.

[spalladino]

Depends on #857