use 24h format

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

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

@@ -254,6 +254,7 @@ class ConversationInfoController(args: Bundle) : BaseController(args), FlexibleA
                         requireFutureDateTime =
                         true,
                         currentDateTime = currentTimeCalendar,
+                        show24HoursView = true,
                         dateTimeCallback = { _,
                             dateTime ->
                             reconfigureLobbyTimerView(dateTime)