All versions of TICE

* Added ability to choose any writable folder for ROM location. * Added ability to simulate actual TI-89 speed. * The ROM's auto-off feature was effectively disabled. * The contrast will now be automatically adjusted on new and reset ROMs. * Increased the overall stability of the application. * Fixed bug where the keypad would be white on Android Oreo (and possibly earlier versions). * Fixed bug where the emulated screen would be corrupt on 64-bit versions of Android.