fix onlinestatus color for night mode

Signed-off-by: Marcel Hibbe <dev@mhibbe.de>

app/src/main/java/com/nextcloud/talk/controllers/ConversationInfoController.kt

@@ -384,7 +384,7 @@ class ConversationInfoController(args: Bundle) :
 
         for (i in participants.indices) {
             participant = participants[i]
-            userItem = UserItem(context, participant, conversationUser, null)
+            userItem = UserItem(router.activity, participant, conversationUser, null)
             if (participant.sessionId != null) {
                 userItem.isOnline = !participant.sessionId.equals("0")
             } else {