Support interval and maxWaitTime for Android watchers

[ricardosohn]

This pull request enhances the location update configuration by allowing clients to specify custom interval and maxWaitTime values for location requests, providing more flexibility over how frequently location updates are received and batched.

Location update configuration improvements:

• The addWatcher method in BackgroundGeolocation.java now accepts interval and maxWaitTime parameters from the plugin call, with sensible defaults if not provided.
• The addWatcher method in BackgroundGeolocationService.java has been updated to use the provided interval and maxWaitTime values when configuring the LocationRequest, and also sets the fastestInterval to match the interval for consistent update timing.

[elliotmitchell]

@jamesdiacono I actually came here to do this exact change myself. Do you mind reviewing it? I've tested it and it works while also being fully backwards compatible

[jamesdiacono]

Thanks for this, if you could just fix the whitespace, add comments in the definitions file, and update the README with the new options I will merge.