Separate vibration from animation

[jessegreenberg]

After discussion with @liquatics .

Current implementation of vibration couples vibration patterns with the animation frame (stepSimulation). See the step function of vibrationManater.

This allows us to know exactly when the phone is vibrating, when the device is in uptime/downtime during a vibration pattern. However, we can't have vibration patterns that are faster than the framerate.

We suspect that we could support faster vibration patterns if we move the navigator.vibrate calls out of step. It is worth it to sacrifice the knowledge of uptime/downtime in a vibration pattern to have this. We may be able to still guess the uptime/downtime in a vibration pattern (at least good enough for the VibrationChart visualization).