I think the suggestion bar deserves its own file/singleton and we need to decouple the keypad from the suggestions.
Currently the "on call" keypad is completely broken by this patch (and we don't want contact suggestions while using the on call keypad anyway).

The KeypadManager could expose a `valueChangedCallback` property and call it (if set) in the `_updatePhoneNumberView` method (passing the `self._phoneNumber` as a parameter).
The `SuggestionManager` could then register for this.
During a call, nobody registers as `valueChangedCallback` so it will work as always.

Makes sens?

(we could also use custom events but it might be overkill since we don't have one-to-many use cases for now)