rework app settings. add Peformance Shift Point.
move sound chime playing onto UI thread.
remove unneccessary comments.
add Performance shift point feature.
clarify comments for new Performance Shift Point feature.
add mCalculating variable to track whether or not vehicleStateCalculation() function is currently running.
add status checks for signal listeners when app is in CAN signal mode.
remove unused imports.
fix preference screen when preferences first opens up. update summary of shift point preference.
add check if FTDI device is connected before attempting to send data.
fix performance shift point mode. working properly now.
fix comparison statement to mPedalPos in shouldDriverShift() function.