feat: The Activity now notifies when the drawer status has changed

[g123k]

To fix #4540 and more particularly the issue with the focus, I had to make some changes.
Right now, the MainActivity has the following lifecycle:

• [User] Click to open the drawer
• [Activity] Close the keyboard
• [User] Select of choice
• [Activity] Change the fragment and close the keyboard

The problem here is that the last keyboard event happens after the fragment is added/attached (after the onResume).

To fix this, the Fragments now can listen to drawer events.
Here is the new lifecycle:

• [User] Click to open the drawer
• [Activity] Close the keyboard
• [User] Select of choice
• [Activity] Change the fragment, close the keyboard and notify the attached Fragment
• [Fragment] Can force the keyboard to be reopened

[teolemon]

@g123k small merge conflicts to solve

[teolemon]

@g123k should I keep both imports ?

[g123k]

@g123k should I keep both imports ?

Yes you can

[VaiTon]

@g123k we should specify that with this approach the activity can only have a fragment listening to the drawer at any given time. Maybe also implement a control on the onAttach to check if the listener was null before attaching.

[g123k]

Thanks for your feedback @VaiTon, I will add them

[g123k]

@VaiTon I've changed my implementation to allow multiple listeners (with a Set).
Is-it better with this approach?

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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0.0% Duplication

[VaiTon]

Sorry for the delay!