Support decoded addresses in TransactionSummary

[VanishMax]

In TransactionSummary computation logic, all addresses are not checked if owned by user, even though all info is available for it: https://github.com/penumbra-zone/penumbra/blob/main/crates/core/transaction/src/view.rs#L128

Web apps call this code in WebAssembly to calculate TransactionSummary and, it is safe to say, expect the AddressView proto to be decoded in the protocol.

[cronokirby]

penumbra/crates/core/transaction/src/view.rs

Line 103 in 07c4ba1

fn accumulate_effects(summary: TransactionSummary) -> TransactionSummary {

should probably be modified to decode the address.

Edit: this would require passing in an FVK, so not sure if that's the best approach.