Merge "stagefright/foundation: fix ALookup for same types" into nyc-dev

    bool lookup(const T& from, U *to);

    bool rlookup(const U& from, T *to);

    inline bool map(const T& from, U *to) { return lookup(from, to); }

    inline bool map(const U& from, T *to) { return rlookup(from, to); }

    template<typename V, typename = typename std::enable_if<!std::is_same<T, V>::value>::type>

    inline bool map(const T& from, V *to) { return lookup(from, to); }

    template<typename V, typename = typename std::enable_if<!std::is_same<T, V>::value>::type>

    inline bool map(const V& from, T *to) { return rlookup(from, to); }

private:

    std::vector<std::pair<T, U>> mTable;