Merge "document isBinderAlive" into main

     */

    virtual const String16& getInterfaceDescriptor() const = 0;

    /**

     * Last known alive status, from last call. May be arbitrarily stale.

     * May be incorrect if a service returns an incorrect status code.

     */

    virtual bool            isBinderAlive() const = 0;

    virtual status_t        pingBinder() = 0;

    virtual status_t        dump(int fd, const Vector<String16>& args) = 0;