Add support for web location tracking

**Is your feature request related to a problem? Please describe.**
There is no reason why this plugin is not supporting browser location tracking via service worker as well

**Describe the solution you'd like**
If a user is using capacitor app in a browser, user should be able to give permission to track location to the application. If permission is granted, service worker continues collecting locations in the background.

**Describe alternatives you've considered**
This is a standard so no need for alternatives

**Additional context**
iOS Safari supports this only while app is used. Soon it may add support for service worker background updates too.