Address: Add static assert to make sure kLength is <= sizeof(uint64_t)

template <>

struct hash<bluetooth::common::Address> {

  std::size_t operator()(const bluetooth::common::Address& val) const {

    static_assert(sizeof(uint64_t) >= bluetooth::common::Address::kLength);

    uint64_t int_addr = 0;

    memcpy(reinterpret_cast<uint8_t*>(&int_addr), val.address, bluetooth::common::Address::kLength);

    return std::hash<uint64_t>{}(int_addr);