[Task] Preload account management URLs

[bmarty]

A memory cache has been implemented in the SDK. See matrix-org/matrix-rust-sdk#4663

We need the application to pre-load the 2 accounts management URLs to populate the in-memory cache. That way, when the user open the settings, the flickering will not be observed for the two entries:

Note that if the app is started without network access, the url cannot be loaded and the settings entries will not be displayed.

There is no change expected on the setting screen, that should still requires the URLs from the SDK.