Added a background service to send the watch battery level to Home Assistant.
Changed the Glance View as requested by a user.
Updated to new HA icon using SVG in stead of PNG.
1. Amended code for a single HomeAssistantService for all 'tap's
2. Removed now redundant GET request for taps without a service now that having a service is enforced.
3. Determined that migrating API code from 'toggle's to the HomeAssistantService is awkward due to the close coupling with other methods in the class.
