Unify interaction source in SwitchPreference

Let toggleable() & Switch share the same MutableInteractionSource.
So when user press SwitchPreference, Switch widget will also have press
effect.

This is also the same behavior of androidx.preference

Also follow best practise to use T or () -> T, instead of State<T> param

Bug: 306658346
Test: manual - with Gallery
Test: unit test
Change-Id: Ibda986fbc034b1cb379d9e7c4c26b22fbd0bc905