Option to determine internal/external URL usage based on Auto-sync status

**Is your feature request related to a problem? Please describe.**

Some apps like DavX or Syncthing offer option to run based on a status of Auto-sync option from Settings ➡️ Passwords & Accounts. The advantage of this approach is that it doesn't require enabled location and it also offers more flexibility with LineageOS System profiles.

Mine second suggestion is to offer option to completely disable the app when not connected to home Wifi/disabled Auto-sync instead of connecting to the external URL. It's only possible to connect to my HA instance from local network, if I understand app behaviour correctly, it still tries to connect to HA on non-home networks to update sensors and can possibly leak information in HTTP mode.
**Describe the solution you'd like**

Adding an option to use external URL/disable app based on the Auto-sync status.

Reference commit from Syncthing:
https://github.com/syncthing/syncthing-android/commit/6a04d640bd0c7dcded028d39a162fb0fa6166127
**Describe alternatives you've considered, if any**

Using external/internal URL based on Wifi SSID is an actual alternative.
**Additional context**