OK, so I was toying around with my developer options on my LG G PAD 7.0 LTE, and I went across come thing that has to do with ART, (I forgot what it exactly was, it happened some time ago.) and now, my tabelt is only staying on Android is upgrading... Optimizing app 1 of 2. It has stayed that way for a really long time. I can't do anything at all besides shut down the tablet. Does anyone know how to fix this?