Defer client visibility update when calculating new config

In ActivityStackSupervisor#ensureVisibilityAndConfig() we first
update visibility of all activities to be able to properly calculate
configuration on the next step. However, we need to make sure the
latest config is applied whenever a client becomes visible.
To prevent making making activities visible without latest config
this CL defers messages to client in first visibility calculation
pass.

Bug: 76011287
Test: ActivityLifecycleTests
Test: ActivityManagerAppConfigurationTests
Change-Id: I978fc800322fb502545650b9f2eece96cd9c7f40