deviceMotionAvailable is true,but startDeviceMotionUpdatesToQueue:(NSOperationQueue *)queue withHandler:(CMDeviceMotionHandler)handler handler not work。
if handler not work, deviceMotionAvailable should back false
deviceMotionAvailable is true,but startDeviceMotionUpdatesToQueue:(NSOperationQueue *)queue withHandler:(CMDeviceMotionHandler)handler handler not work。
if handler not work, deviceMotionAvailable should back false