[nrf fromtree] Bluetooth: Audio: CSIS: Check all pending notifications

- When a bonded device is reconnected, check flags for pending
  notifications for:
 - Lock
 - SIRK
 - Size

Previously only lock was checked

Signed-off-by: Alexander Svensen <alexander.svensen@nordicsemi.no>
(cherry picked from commit fa8c244)

Author: alexsven

subsys/bluetooth/audio/csip_set_member.c

@@ -520,8 +520,10 @@ static void csip_security_changed(struct bt_conn *conn, bt_security_t level,
 			return;
 		}
 
-		/* Check if client is set with FLAG_NOTIFY_LOCK */
-		if (atomic_test_bit(client->flags, FLAG_NOTIFY_LOCK)) {
+		/* Check if client has pending notifications */
+		if (atomic_test_bit(client->flags, FLAG_NOTIFY_LOCK) ||
+		    atomic_test_bit(client->flags, FLAG_NOTIFY_SIRK) ||
+		    atomic_test_bit(client->flags, FLAG_NOTIFY_SIZE)) {
 			notify_work_reschedule(K_NO_WAIT);
 			break;
 		}