Bug 1985514 - Restore having the home bottom toolbar on top of keyboard after cold starts r=android-reviewers,Roger

Investigations showed that insets listeners were not called in this scenario
but using a View instead of the newly built ComposeView to listen for insets
changes restores the behavior we had.

Differential Revision: https://phabricator.services.mozilla.com/D262793

Author: Mugurell

mobile/android/fenix/app/src/main/java/org/mozilla/fenix/home/toolbar/HomeToolbarComposable.kt

@@ -162,7 +162,7 @@ internal class HomeToolbarComposable(
         }
 
         if (settings.shouldUseBottomToolbar) {
-            ImeInsetsSynchronizer.setup(layout)
+            ImeInsetsSynchronizer.setup(homeBinding.root)
         }
 
         updateHomeAppBarIntegration()