Minecraft – do when I can’t move in Minecraft on the Android and Hide GUI/HUD is already turned off

Try logging into the Steam Store or Steam Community websites.
A similar issue has happened to me and after logging into the website when I realized it was just a server issue preventing me from logging into the Steam Client, as the Steam servers go offline from time to time for scheduled maintainance.

Might just have to be patient if you can login to the website but not into the client.

This is a common problem with Kindles, as they get all the minecraft updates first, even when they are not completely finished. Luckily for you, a new update for minecraft has just come out which should fix this problem as well as add the cartoon texture pack. Just update your minecraft and it should work.