first you have to download the zip, and extract its contents, then move the maps to the following folder (let me know if the following works, as i think the maps are internally version 1.4.1, and mobile is 1.4.0, if the names are in red, then it doesnt work and i'll see about that then.)
internal storage > Android > data > com.and.games505.TerrariaPaid = Within this folder, is the "Players" and "Worlds" folders.