Improve and add previews.

Author: bmarty

libraries/matrixui/src/main/kotlin/io/element/android/libraries/matrix/ui/components/SpaceRoomProvider.kt

@@ -27,6 +27,7 @@ class SpaceRoomProvider : PreviewParameterProvider<SpaceRoom> {
             state = CurrentUserMembership.LEFT,
         ),
         aSpaceRoom(
+            displayName = "Alice",
             roomType = RoomType.Room,
             isDirect = true,
             heroes = listOf(aMatrixUser(displayName = "Alice")),
@@ -66,5 +67,12 @@ class SpaceRoomProvider : PreviewParameterProvider<SpaceRoom> {
             roomId = RoomId("!spaceId2:example.com"),
             state = CurrentUserMembership.INVITED,
         ),
+        aSpaceRoom(
+            displayName = "Alice",
+            roomType = RoomType.Space,
+            heroes = listOf(aMatrixUser(displayName = "Alice")),
+            state = CurrentUserMembership.JOINED,
+            numJoinedMembers = 2,
+        ),
     )
 }