Merge "Merge the changes about the tests repeated setResolverConfiguration"...

        mPrivateDnsTransports.erase(netId);

        resolv_stats_set_servers_for_dot(netId, {});

        mPrivateDnsValidateThreads.erase(netId);

        // TODO: As mPrivateDnsValidateThreads is reset, validation threads which haven't yet

        // finished are considered outdated. Consider signaling the outdated validation threads to

        // stop them from updating the state of PrivateDnsConfiguration (possibly disallow them to

        // report onPrivateDnsValidationEvent).

        return 0;

    }

    // Wait for the expected private DNS validation result until timeout.

    bool waitForPrivateDnsValidation(const std::string& serverAddr, const bool validated);

    // Return true if a validation result for |serverAddr| is found; otherwise, return false.

    // Only exists for testing.

    bool findValidationRecord(const std::string& serverAddr) const EXCLUDES(mMutex) {

        std::lock_guard lock(mMutex);

        return mValidationRecords.find({mNetId, serverAddr}) != mValidationRecords.end();

    }

  private:

    typedef std::pair<int32_t, std::string> ServerKey;

                break;

            }

            accept_connection_count_++;

            if (hangOnHandshake_) {

                LOG(DEBUG) << "TEST ONLY: unresponsive to SSL handshake";

    int queries() const { return queries_; }

    void clearQueries() { queries_ = 0; }

    bool waitForQueries(int expected_count) const;

    int acceptConnectionsCount() const { return accept_connection_count_; }

    void set_chain_length(int length) { chain_length_ = length; }

    void setHangOnHandshakeForTesting(bool hangOnHandshake) { hangOnHandshake_ = hangOnHandshake; }

    // Eventfd used to signal for the handler thread termination.

    android::base::unique_fd event_fd_;

    std::atomic<int> queries_ = 0;

    std::atomic<int> accept_connection_count_ = 0;

    std::thread handler_thread_ GUARDED_BY(update_mutex_);

    std::mutex update_mutex_;

    int chain_length_ = 1;