Safer to use NotificationManagerCompat rather than NotificationManager

Signed-off-by: Dariusz Olszewski <starypatyk@users.noreply.github.com>

app/src/main/java/com/nextcloud/talk/utils/NotificationUtils.kt

@@ -138,7 +138,7 @@ object NotificationUtils {
             context.resources.getString(R.string.nc_notification_channel_messages),
             context.resources.getString(R.string.nc_notification_channel_messages),
             true,
-            NotificationManager.IMPORTANCE_HIGH,
+            NotificationManagerCompat.IMPORTANCE_HIGH,
             soundUri,
             audioAttributes,
             null,