how do mobile notifications from 0xchat work, and are they private from Google and Apple sellsnotifications services? nostr:nprofile1qqs9ajjs5p904ml92evlkayppdpx2n3zdrq6ejnw2wqphxrzmd62swspzemhxue69uhhyetvv9ujuvrcvd5xzapwvdhk6qgdwaehxw309aukzcn49ekk2qg5waehxw309aex2mrp0yhxgctdw4eju6t0vwuavy