Force Fast Charge (live switching)

-Based on Force AC (Fast) Charging by Chad Froebel

-Add disabling vbus so that it's only charging. No USB Mass storage, ADB
or USB connectivity of any kind. Should charge even faster right?

-Implemented a redetect when the setting changes so we can switch live. No
unplugging or reboots needed. Switch it off and USB Mass storage and ADB
come right back!