Implement haptics

[Luc1412]

The user experience can be upgraded with haptic feedback. There are significant differences between iOS and Android, since Apple devices are guaranteed to provide high quality haptic feedback with their haptic engine. Android devices vary, since modern devices probably include better haptic feedback, but especially old devices doesn't.

Events to trigger haptic feedback:

• Opening the bottom modal for adding token
• Successfully added token
• Refreshing tokens
• Incoming Push request while app open
• Accepting push request
• Declining Push request