The right of control and use of the public streets, highways, sidewalks, alleys, parks, public squares, and public places of the City is hereby declared to be inalienable by the City, except by ordinances not in conflict with the provisions of this Charter. No act or omission by the City Council or any officer of agent of the City shall be construed to grant, renew, extend, or amend, expressly or by estoppel or implication, any right, franchise, or easement affecting said public streets, highways, sidewalks, alleys, parks, public squares, public places, and other real property, except as provided in this Charter.