Fix initial switch position

[leolost2605]

Currently when launching the switches are in the wrong position compared to their state for options that are toggled on.

[danirabbit]

Or actually, why is that binding to state instead of active?

[leolost2605]

The docs say state should represent the underlying well "state" of the backend and it's represented by the color whereas active is represented by the switch position and should respond immediately to user input.
active should be bound to state by the default signal handler for state_set but that doesn't seem to work for setting it the first time.

Are we sure we don't just need to add sync create here? https://github.com/elementary/switchboard-plug-notifications/blob/main/src/Widgets/AppSettingsView.vala

AFAIK setting bindings are sync create by default (it's not even an available flag)