Use new Rust fields numUnreadMessages and numUnreadMentions, and iterate on the room badge rendering.

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/roomlist/RoomSummary.kt

@@ -40,7 +40,8 @@ data class RoomSummaryDetails(
     val isDirect: Boolean,
     val avatarUrl: String?,
     val lastMessage: RoomMessage?,
-    val unreadNotificationCount: Int,
+    val numUnreadMessages: Int,
+    val numUnreadMentions: Int,
     val inviter: RoomMember?,
     val userDefinedNotificationMode: RoomNotificationMode?,
     val hasRoomCall: Boolean,