Allow displaying only unread notifications (#7803)

* Allow displaying only unread notifications

Add `FeatureFlags.ShowAllActivityInRoomList` (enabled by default, to match the current behavior) that, when disabled, will display the unread messages of a room instead of unread notifications if no unread notifications are found

* Restore UI changes to the badges, `RoomSummaryRow` and `HorizontalFloatingToolbar`

* Fix `NavigationBarIcon`: use `BadgeBox` component.

* Adjust padding in `RoomSummaryRow` to 6.dp

* Fix other indicators not displaying a dot anymore

* Update screenshots

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Co-authored-by: ElementBot <android@element.io>

libraries/featureflag/api/src/main/kotlin/io/element/android/libraries/featureflag/api/FeatureFlags.kt

@@ -169,4 +169,13 @@ enum class FeatureFlags(
         defaultValue = { false },
         isFinished = false,
     ),
+    ShowAllActivityInRoomList(
+        key = "feature.show_all_activity_in_room_list",
+        title = "Show all activity in room list",
+        description = "Show all activity indicators in the room list, using unread messages instead of notifications.",
+        defaultValue = { true },
+        // To hide it from the developer options, since it's displayed in the notification settings instead
+        isFinished = true,
+        isInLabs = false,
+    )
 }